Abstract
Evidences showing that chromosomes in eukaryota, with their complex organization, exhibit dynamism in structure and behaviour for controlling differentiation, variability and reproduction have been reviewed. An outline has been given of the stepwise evolution of the functionally differentiated chromosome segments and their chemical make up including protein components and sequence complexity of DNA. The outline includes the origin of chromosomal control of metabolism in extranuclear organelles.
During organogenesis, the chromosomes, maintaining the basic genetic skeleton, undergo variation in structure and chemical components, thus exhibiting dynamism. Addition, loss and inactivation of heterochromatic segments have been correlated with adaptation and alteration in chromosome size. Data on the possible role of repeated sequences in control and integration have been presented.
Endomitotic replication of the chromosome, in place of normal mitosis, during differentiation is an example of dynamic behaviour, adapted to meet the need of uninterrupted transcription during differentiation without increasing the number of cells. The predetermined symmetrical growth of the organism is thus maintained.
In several asexually reproducing species, dynamism is manifested in genetically controlled unusual behaviour of chromosomes, where the somatic tissue often represents a chromosome mosaic. It has been adapted to meet the need of generating variability and genotypes through bud mutation in the absence of effective sexual reproduction.
Data in favour of the concept of dynamism indicate that evolution of eukaryotic chromosome has involved progressive complexity of chromosome structure on the one hand, and flexibility in its behaviour and structure, maintaining the basic genetic make up, on the other. It has enabled the chromosomes to exert supreme control on all aspects of metabolism which are sequential and phasic in higher organisms.
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References
Agutter P S, McArdle H J and McCaldin B 1976 Evidence for involvement of nuclear envelope nucleoside triphosphate in nucleocytoplasmic translocations of ribonucleoprotein;Nature (London) 263 165–166
Ayles G B, Sanders T G, Keiter B I and Susuki T 1973 Temperature sensitive mutations inDrosophila melanogaster XI Male sterile mutants of the Y chromosome;Dev. Biol. 32 239–257
Bachman K, Harrington B A and Craig J P 1972 Genome size in birds;Chromosoma 37 405
Banerjee M and Sharma A K 1978 DNA variability in different organs;Experientia in press
Barlow P W and Sherman M I 1972 The biochemistry of differentiation of mouse trophoblast;J Embryol. Exptl. Morphol. 27 447
Bateman A J 1975 Simplification of palindromic telomere theory;Nature (London) 253 379
Baxter R 1971 Origin and continuity of mitrochondria.Origin and Continuity of Cell Organelles eds J Reinert and H Ursprung. (Berlin: Springer Verlag) Vol. 2, pp. 46–84
Beale J H and Knowles J K C 1976 Interspecific transfer of mitochondria toParamecium aurelia;Mol. Gen. Genet. 143 197–201
Beermann W 1972 Chromosomes and genes inResults and Problems of Cell differentiation. (Berlin: Springer Verlag)
Bell P R and Muhlethaler K 1964 The degeneration and reappearance of mitochondria in the egg cells of a plant;J. Cell Biol. 20 235
Bennett H D and Rees H 1967 Natural and induced changes in chromosome size and mass in meristems;Nature (London) 215 93–94
Bennett M D 1973 Nuclear characters in plantsBrookhaven Symp. Biol. 25 344–366
Bennett J and Radcliffe C 1975 Plastid DNA replication and plastid division in the garden pea;FEBS Lett. 56 222–225
Bennett M D and Smith J B 1976 Nuclear DNA amounts in angiosperms;Philos. Trans. R. Soc. London Ser. B274 227
Berlin R B and Oliver J M 1975 Membrane transport of purine and pyrimidine bases and nucleosides in animal cells;Int. Rev. Cytol. 42 287–336
Bhattacharyya G N 1968 Chromosomes of different species of theAgave;J. Cyt. Genet. 3 1–16
Bhattacharyya U C 1957 Karyotypic variation inScindapsus officinalis;Caryologia 9 286–292
Biessmann H and Rajewsky M F 1975 Nuclear protein patterns in developing and adult brain and in ethylnitrosourea induced neuroectodermal tumours of the rat;J. Neurochem. 24 387–393
Birnsteil M L, Sells B H and Purdom F 1972 Kinetic complexity of RNA molecules;J. Molec. Biol. 63 21–39
Biswas B B, Mandal R R, Stevens A and Cohn A 1974 eds.Control of transcription (New York: Plenum Press)
Blangy D, Dulbecco R, Haas M and Vogt H 1974 Integration of viral DNA in transformed cellsMolecular studies on viral neoplasia, (Maryland: William and Wilkins)
Bloch D P and Hew H J 1960 Schedule of spermatogenesis in the pulmonate snailHelix aspera;J. Biophys. Biochem. Cytol. 7 515–531
Bogorad L, Davidson J H, Hanson M R and Mets L 1975 Intergenomic cooperation in the synthesis of chloroplast ribosomes ofChlamydomonas; Abst. XII Int. Bot. Congr. 398
Bonner Jet al 1968 Isolation and characterization of chromosomal nucleoproteins inMethods in Enzymology (Nucleic Acids) eds L Grossman and K Moldave (New York: Academic Press) Vol. 12, pp. 3–64
Britten R J and Davidson E H 1971 Repetitive and non-repetitive DNA sequences and a speculation on the origins of evolutionary novelty;Q. Rev. Biol. 46 46–111
Britten R J and Kohne D E 1968 Repetitive sequences in DNA;Science 161 529
Brown D D and Sugimoto K 1973 The 5S DNAs ofXenopus laevis andX. mulleri. The evolution of a gene family;J. Molec. Biol. 78 397
Brown D D and Weber C S 1968 Gene linkage by RNA-DNA hybridization;J. Molec. Biol. 34 661
Brown D D, Wensink P C and Jordan E 1977 Purification and some characteristics of 5S DNA fromXenopus laevis;Proc. Nat. Acad. Sci. (Wash.) 68 3175–3179
Brown S W 1966 Heterochromatin;Science 151 417–425
Buclow D E 1976 Phylogenetic origin of the chloroplast;J. Protozool. 23 41–47
Busch H 1973Nucleolus inComprehensive Biochemistry and Cytochemistry, eds M Florkin and E H Stolz) p. 23
Callan H G 1973 Replication of DNA in eukaryotic chromosomes;Brit. Med. Bull. 29 192–195
Camara A 1951 Progressos no estudo do centromere;Broteria 20 5–34
Cameron I L and Jeter J R 1934 eds.Chromosome Chemistry—Acidic Proteins of the Nucleus (New York: Academic Press)
Cameron I L, Padilla G M and Zimmerman A M (eds) 1971Developmental aspects of Cell Biology (New York: Academic Press)
Carter B L A 1975 The organization and replication of genetic material in yeast;Cell 6 259–268
Caspersson T 1975 T V based analysis of Giemsa banded chromosomes;Exp. Cell Res. 92 497–499
Cattanach B M 1975 Control of chromosome inactivation;Ann. Rev. Genet. 9 1–18
Cavalier-Smith T 1975 The origin of nuclei and of eukaryotic cells;Nature (London) 256 463–468
Cavalier-Smith T 1976 Long palindromes in eukaryotic DNA;Nature (London) 262 255–256
Chakravorti A K 1951 Origin of cultivated bananas of south east Asia;Indian J. Genet. Plant Breed. 11 34
Chiarelli B 1974 Bands or chromomeres: a functional interpretation of banding and speculation about a model of nucleolus and chromosome organization in the eukaryotes;Leiden Chr. Conf. 14
Choudhury R, Gajra P K and Sharma A K 1978 Isolated DNA from active and differentiated nucleiUnpublished data
Chrispeels M J (ed.) 1973Molecular techniques and approaches in developmental biology. (New York: Wiley-Interscience)
Clawes F A L 1971 Cell organelles and the differentiation of somatic plant cells inOrigin and continuity of cell organelles eds Reinert J and Ursprung H (Berlin: Springer-Verlag) Vol. 2, p. 323
Clutter M, Brady T, Walbot V and Sussex I 1974J. Cell Biol. 63 1097–1192
Comings D E 19663H uridine autoradiography of human chromosomes;Cytogenetics 5 247–260
Comings D E 1972 The structure and function of chromatin;Adv. Human Genet. eds. H Harris and K Hirschhorn (New York: Plenum press) Vol. 3, pp. 237–431
Comings D E 1974The Cell Nucleus ed. H Busch (New York: Academic Press) Vol. 1, pp. 537–563
Comings D E and Okada T A 1972a Architecture of meiotic cells and mechanism of chromosome pairing;Adv. Cell. Mol. Biol. ed. E J Dupraw (New York: Academic Press) Vol. 2, pp. 309–384
Comings D E and Okada T A 1972b Electron microscopy of chromosomes inPerspectives in cytogenetics. The next decade eds S W Wright, B F Crandall and L Boyer (Springfield) pp. 223–250
Cook P R 1973 Hypothesis on differentiation and the inheritance of gene superstructure;Nature (London) 245 23–25
Cullis C A and Schweizer D 1974 Repetitious DNA in someAnemone species;Chromosoma 44 417–421
D’Amato F 1964 Endopolyploidy as a factor in plant tissue development;Caryologia 17 41–52
Darlington C D 1964Chromosome Botany (London: George Allen and Unwin)
Das C C, Kaufmann B P and Gay H 1964 Histone protein transition in Drosophila melanogaster,Exp. Cell Res. 35 507–514
Davidson E H, Galau G A, Angerer R C and Britten R S 1975 Comparative aspects of DNA organization in metazoa;Chromosoma 51 253
Davies H G 1968 Electron microscope observations on the organization of heterochromatin in certain cells;J. Cell Sci. 3 129–150
De Duve C and Baudihin P 1966 Peroxisomes (microbodies and related particles);Physiol. Rev. 46 323–357
De Wet J M J and Harlan J R 1972Taxon 21 67
Doerschug E B 1976 Placement of genes for ribosomal RNA within the nucleolar organizing body ofZea mays;Chromosoma 55 43–56
Dover G A 1975 The heterogeneity of B chromosome DNA;Chromosoma 53 153–173
Dowben R 1971 Origin of life inTopics in cell biology, inheritance and evolution (New York: Harper and Row) pp. 521–537
Du Buy H G and Riley F L 1967 Hybridization between nuclear and kinetoplast DNAs ofLeishmania emrieti and between nuclear and mitochondrial DNAs of mouse liver;Proc. Nat. Acad. Sci. (Wash.) 57 790–797
Dupraw E J 1970DNA and Chromosomes (New York: Holt, Rinehart and Winston)
Echlin P 1966 The cyanophytic origin of higher plant chloroplasts;Br. Phycol. Bull. 3 150–151
Edelman M, Swinton D, Schiff J A, Epstein H T and Zelolin B 1967 Deoxyribonucleic acid of the blue green algae;Bact. Rev. 31 315–331
Edenberg H J and Huberman J A 1975 Eukaryotic chromosome replication;Ann. Rev. Genet. 9 245–284
Emmerich G 1973 Electron enmikroskopische untersuchungen interchromosom alar fädiger structuren an menschlichen lymphocyten in der metaphase;Hum. Genet. 19 227–234
Essad S, Vallade J and Cornu A 1975 Variations interphasique de la teneur en DNA et du volume nucleiaires du zygote dePetunia hybrida—consequences metabolique;Caryologia 28 207–224
Evans H J, Buckland R A and Pardue M L 1974 Location of genes coding for 18S and 28S ribosomal RNA in human genome;Chromosoma 48 405–426
Evans L S and Van’t Hof J 1975 Is polyploidy necessary for tissue differentiation in higher plants;Am. J. Bot. 62 1060–1064
Evstigneev V B 1975 On the evolution of photosynthetic pigments;Origins of Life 6 435–439
Felix K, Fischer H and Krekels A 1956 Protamines and nucleoproteins;Progr. Biophys. 6 1–23
Flavell R B and Smith D B 1975 Genome organization in higher plants;Stadler Genet. Symp. 7 47–70
Fogg G E, Stewart W D P, Fay P and Walsky A E 1973 The blue green algae (New York: Academic Press)
Franke W W and Scheer K 1974 Structure and function of nuclear envelope.The Cell Nucleus ed. H Busch (New York: Academic Press) Vol. 1, pp. 220–347
Funaki K, Matsui S and Sasaki M 1975 Location of nucleolus organizers in animal and plant chromosomes by means of an improved ‘ N ’ band technique;Chromosoma 49 355–370
Gage L P 1974 Polyploidization of the gland ofBombyx mori.;J. Molec. Biol. 85 97–108
Geitler L 1953 Endomitose and endomitotische Polyploidisierung,Protoplasmatologia C6 (Wien: Springer)
Ghose S 1976 The nucleolar structure;Int. Rev. Cytol. 44 1–28
Godward M B E (ed.) 1966The Chromosomes of the Algae (London: Edward Arnold)
Golubovskaya I N and Mashenkov A S 1976 Genetic control of meiosis II. A desynaptic mutant in maize by N-nitrose-N-methyl urea;Genetika 12 7–14
Goodpasture C and Bloom S E 1975 Visualization of nuclear organizer regions in mammalian chromosomes using silver staining;Chromosoma 53 37–50
Gorovsky M A and Woodard J 1967 Histone content of chromosomal loci active and inactive in RNA synthesis;J. Cell Biol. 33 723–728
Gross L 1974 Facts and theories on viruses causing cancer and leukaemia;Proc. Natl. Acad. Sci. (Wash.)71 2013
Grundmann E (ed.) 1974 Special topics in Carcinogenesis; inRecent results in cancer research (Berlin: Springer-Verlag)
Guille E and Quetier F 1973 Heterochromatin, redundant and metabolic DNAs. A new hypothesis about structure and function.Progress in Biophysics and Molecular Biology eds A J V Butler and D Noble (Oxford: Pergamon) pp. 121–142
Hansan E D 1976 Major evolutionary trends in the animal protists;J. Protozool. 23 4–12
Heath B 1974 Genome separation mechanisms in prokaryotes, algae and fungi; inThe Cell Nucleus ed. H Busch (New York: Academic Press) Vol. 2, pp. 487–575
Hecht F, Wyandt H E and Megenis R E H 1974 The human cell nucleus, quinacrine and other differential stains in the study of chromatin and chromosomes; inThe Cell Nucleus ed. H Busch (New York: Academic Press) Vol. 2, pp. 32–121
Henderson A S, Warburton D and Atwood K C 1972 Location of ribosomal DNA in the human chromosome complement;Proc. Natl. Acad. Sci. U.S. 63 3394–3398
Henderson A S, Warburton D and Atwood K C 1974a Localization of rDNA in the chimpanzee chromosome complement;Chromosoma 46 335–341
Henderson A S, Eicher E M, Yu M P and Atwood K C 1974b The chromosomal location of ribosomal DNA in the mouse;Chromosoma 49 155–160
Himes M and Beam C A 1975 Genetic analysis of the dinoflagellateCryptothecodinium (Gyrodinium) Cohnii: evidence for unusual meiosis;Proc. Natl. Acad. Sci. (Wash.) 72 4546–4549
Ho K M and Kasha K J 1975 Genetic control of chromosome elimination during haploid formation in barley;Genetics 81 263–275
Holmgren P, Rasmuson B, Johansson F and Sundquist G 1976 Histone content in relation to amount of heterochromatin and developmental stage in species ofDrosophila;Chromosoma 54 99–119
Hoober J K and Blobel G 1969 Characterization of chloroplastic and cytoplasmic ribosomes ofChlamydomonas reinhardi;J. Molec. Biol. 41 121–138
Hsu T C 1975 A possible function of constitutive heterochromatin: the bodyguard hypothesis;Genetics 79 Suppl.II. 137
Hsu T C, Spirito S E and Pardue M L 1975 Distribution of 18 and 28S ribosomal genes in mammalian genomes;Chromosoma 53 25–36
Huang R C and Smith M M 1972 Nucleic acid hybridization and the nature of chromosomal protein bound RNA inResults and Problems of Cell Differentiation ed. H Ursprung (Berlin: Springer- Verlag) Vol.3, pp. 65–76
Huskins C L 1952 Nuclear reproduction;Int. Rev. Cytol. 1 9–26
Huskins C L and Steinitz L 1948 The nucleus in differentiation and development induced mitosis in differentiated tissues ofRhoeo roots;J. Hered. 39 66–77
Ingle J and Timmis J N 1975 A role for differential replication of DNA in development.Modification of the information content of plant cells ed. P Markham (North Holland: Elsevier) pp. 37–52
Innocenti A M 1975 Cyclic changes of histone DNA ratios in differentiating nuclei of metaxylem cell line inAllium cepa root tip;Caryologia 28 225–228
Izawa M, Allfrey V G and Mirsky A E 1963 Composition of the nucleus and chromosome in the lampbrush stage of the new oocyte;Proc. Nat. Acad. Sci. U.S. 50 811–817
Jackson V, Granner D K and Chalkley R 1975 Deposition of histones on replicating chromosomes;Proc. Nat. Acad. Sci. (Wash.) 72 4440–4444
Jaffray J Y and Geneix A 1974 Interchromosomal fibres: human ultrastructural study by a recent technique;Hum. Genet. 25 119–126
Jones K W 1970 Chromosomal and nuclear location of mouse satellite DNA in individual cells;Nature (London) 226 912–915
Jones K W 1973 The method ofin situ hybridization inNew Techniques in Biophysics and Cell Biology eds R H Pain and B J Smith (New York: John Wiley and Sons) Vol.1, pp. 29–66
Jones K W 1976 Repetitive DNA sequences in animals, particularly primates;Chromosomes Today 5 305
Jones R N 1975 B chromosome system in flowering plant and animal species;Int. Rev. Cytol. 40 1–100
Jones R N and Brown L M 1976 Chromosome evolution and DNA variation inCrepis;Heredity 36 91–104
Kano Y, Maeda S and Sugiyama T 1976 The location of ribosomal cistrons in the chromosomes of rat;Chromosoma 55 37–42
Kasper C B 1974 Chemical and biochemical properties of the cell nucleus inThe Cell Nucleus ed. H Busch (New York: Academic Press) Vol.1, pp. 349–384
Kaufmann B P and Gay H 1958 Nuclear membrane as an intermediary in gene controlled reactions;Nucleus 1 57–74
Khesin R B and Lükovitch B A 1976 Chromosome structure, histones and gene activity inDrosophila;J. Mol. Biol. 10 3–34
Kislev N and Eisenstadt J M 1972Eur. J. Biochem. 31 226–229
Klein R and Cronquist A 1967 A consideration of the evolutionary and taxonomic significance of some biochemical, macromorphological and physiological characters in Thallophytes;Q. Rev. Biol. 42 105–296
Klimenko A I, Malyshev H B and Nikitin V N 1975 Heterogeneity and the synthesis of non histone protein of liver cell chromatin in the postnatal ontogenesis of white rats;Dokl. Akad. Nauk. SSSR 225 714–716
Knempel P L 1970 Bacterial chromosome replication;Adv. Cell Biol. ed. D Prescott (Amsterdam: North Holland); Vol.1, p. 356
Kraemer P M, Deuven L L, Crissman H A and Van Dilla M A 1972 DNA constancy despite variability in chromosome number;Adv. in Cell and Molecular Biology ed. E J Dupraw (New York: Academic Press) Vol. 2, pp. 47–103
Kubai D M 1975 The evolution of the mitotic spindle;Int. Rev. Cytol. 43 167–227
Kuntzel H 1969 Proteins of mitochondrial and cytoplasmic ribosomes fromNeurospora crassa;Nature (London) 222 142–146
La Cour L F 1951 Heterochromatin and the organization of nucleoli in plants;Heredity 5 37–50
La Cour L F 1952 TheLuzula system analysed by X-rays;Heredity Suppl. 7 77–81
Laird C D 1971 Chromatid structure: relationship between DNA content and nucleotide sequence diversity;Chromosoma 32 378–406
Lasek R J and Dower W J 1971Aplysia californica: analysis of nuclear DNA in individual nuclei of giant neurons;Science 172 278–280
Lima-de-Faria A 1975 The relation between chromosomes, replicons, operons, transcription units, genes, viruses, palindromes;Hereditas 81 249–284
Lima-de-Faria Aet al 1975 Relation between rRNA genes and in DNA satellites ofPhaseolus coccineus;Hereditas 79 5–50
Lindsley D L and Novitsky E 1958 Localization of genetic factors responsible for kinetic activity of X chromosomes ofDrosophila melanogaster;Am. Nat. 22 485–520
Loeblich A R 1976 Dinoflagellate evolution—speculation and evidence;J. Protozool. 23 13–28
Lopez Perez M J and Turner G 1975 Mitochondrial DNA fromAspergillus nidulans;FEBS Lett. 58 159–163
Lozzio B B, Lozzio C B Bomberger E G and Lair S V 1975 Regulators of cell division—endogenous mitotic inhibitors of mammalian cells;Int. Rev. Cytol. 42 1–47
Lyon M F 1974 Mechanisms of evolutionary origin of variable X chromosome activity in mammals;Proc. R. Soc. (London) B187 243–268
Maclnnes J W and Uretz R B 1967 Thermal depolarization of fluorescence from polytene chromosomes stained with acridine orange;J. Cell Biol. 33 597–604
Mahler H R and Raff R A 1975 The evolutionary origin of the mitochondrion—a nonsymbiotic model;Int. Rev. Cytol. 43 2–124
Margulis L 1968 Evolutionary criteria in thallophytes—a radical alternative;Science 161 1020–1022
Margulis L 1970Origin of eukaryotic cells (New Haven, Conn: Yale Univ. Press)
Margulis L 1976 The theme (mitotic cell division) and the variations (protists): implications for higher taxa;Taxon 25 340–391
Marks G E 1976 Variation of Giemsa banding patterns in the chromosomes ofAnemone blanda;Chromosomes Today 5 331
Mason L (ed.) 1972Biomembranes (New York: Plenum Press) pp. 1–2
Matsui S and Sasaki M 1973 Differential staining of nucleolus organizers in mammalian chromosomes;Nature (London) 246 148–150
Matsui S and Sasaki M 1975 The mechanism of Giemsa banding of mammalian chromosomes with special attention to the role of non histone proteins;Jpn. J. Genet. 50 189–204
Mazrimas J A and Hatch F T 1972 A possible relationship between satellite DNA and the evolution of Kangaroo rat species;Nature (London) New Biol. 240 102–105
Merschkowsky C 1905 Uber Natur and Ursprung der chromatophoren in Pflanzenreiche;Biol. Zbl. 25 593–604
Millard A and Spencer D 1974Aust. J. Plant Physiol. 1 331–341
Mirsky A E and Ris H 1947 The chemical composition of isolated chromosomes;J. Gen. Physiol. 13 7–18
Mookerjea A 1955a Cytology of Amaryllids as an aid to the understanding of evolution;Caryologia 7 1–71
Mookerjea A 1955b Cytology of different species of Aroids with a view to trace the basis of their evolution;Caryologia 7 221–291
Mookerjea A 1956 A cytological study of several members of the Liliaceae and their interrelationships;Ann. Bot. Soc. Vanamo 29 1–44
Mulherkar R, Talukder G and Sharma A 1978 Changes in DNA values in human foetal tissuesin vitro (in press)
Müntzing A 1974 Accessory chromosomes;Ann. Rev. Genet. 8 243–266
Nägl W 1970a The mitotic and endomitotic nuclear cycle inAllium carinatum: Relation between DNA reduplication and chromosome structure;Caryologia 23 71–78
Nägl W 1970b Temperature induced functional structure in the polytene chromosomes inPhaseolus with special reference to nucleous organizers;J. Cell Sci. 6 87–107
Nägl W 1970c Inhibition of polytene chromosome formation inPhaseolus by polyploid mitoses;Cytologia 35 252–258
Nägl W 1972 Molecular and structural aspects of the endomitotic chromosome cycle in angiosperms;Chromosome Today eds C D Darlington and K R Lewis (London: Oliver and Boyd) Vol. 3, pp 17–23
Nägl W 1975 Organization and replication of the eukaryotic chromosomes;Prog. Bot. 37 186–210
Nägl W 1976aZellknon nted. Zellkylen (Ulmer: Stuttgart)
Nägl W 1976b Nuclear organization;Ann. Rev. Pl. Physiol. 27 39–69
Nägl W 1976c DNA reduplication and polyteny understood as evolutionary strategies;Nature (London) 261 614–615
Nägl W 1977 The evolution of chromosomal DNA redundancy;Nucleus 20 10–26
Narayan R R J and Rees H 1976 Nuclear DNA variation inLathyrus;Chromosoma 54 141–154
Noda S 1975 Somatic origin of chromosome aberrations inScillia scilloides andLillium tigrinum;Bull. Cul. Nat. Sci. 1 97–104
Oakley B R and Dodge J D 1974J. Cell Biol. 63 322–325
Odintsova M S and Yurina N P 1975 On the origin of plastids;Origin of Life 6 441–446
Ohno S 1972 So much junk DNA in one genome;Brookhaven Symp. Biol. 23 366–370
Ohno S, Gellov L M and Kan J 1974 The analysis of Lyon’s hypothesis through preferential X in-activation;Cell 1 175–184
Oki I and Tomura S 1975 A fresh water planarian with heterogeneous cell populations of two different chromosome numbers;Zool. Mag. 84 61–63
Parag Y and Roper J A 1975 Genetic control of chromosomal instability inAspergillus nidulans as a means for gene reduplication in eukaryotic organisms;Mol. Gen. Genet. 140 275–287
Pardon J F, Wilkins M H T and Richards B M 1967 Superhelical model for nucleohistone;Nature (London) 215 508–509
Pardue M L 1974 Localization of repeated DNA sequences in Xenopus chromosomes;Cold Spring Harb. Symp. Quant. Biol. 38 475–482
Pardue M L 1975 Repeated DNA sequences in the chromosomes of higher organisms;Genetics 79 159
Pardue M L and Gall J G 1970 Chromosomal localization of mouse satellite DNA;Science (Wash) 168 1356
Pardue M L and Hsu T C 1975 Location of 18S and 28S ribosomal genes in the chromosomes of the Indian muntjac;J. Cell Biol. 64 251–254
Pardue M L, Brown D D and Brinsteil M L 1973 Location of the genes for 5S ribosomai RNA inXenopus laevis;Chromosoma 42 191–203
Parenti Ret al 1973 Transient DNA satellite in dedifferentiating pith tissue;Nature (London) New Biol. 246 237–239
Pathak S, Hsu T C and Arrighi F E 1973 Chromosomes of Peromyscus IV. The role of heterochromatin in karyotype evolution;Cytogenet. Cell Genet. 12 315–326
Paul I J and Duerksen J D 1975 Chromatin associated RNA content of heterochromatin and euchromatin;Mol. Cell Biochem. 9 9–16
Pavan C 1965 Nucleic acid metabolism in the polytene chromosome and the problem of differentiation;Brookhav. Symp. Biol. 18 222–241
Pearson C C, Timmis J N and Ingle J 1974 The differential replication of DNA during plant development;Chromosoma 45 281
Pelc S R 1972 Metabolic DNA in ciliated protozoa, salivary gland chromosomes and mammalian cells;Int. Rev. Cytol. 32 327–355
Pickett-Heaps J D 1969 The evolution of the mitotic apparatus: an attempt at comparative ultrastructural cytology of dividing plant cells;Cytobios 31 257–280
Pickett-Heaps J D 1974Biosystems 6 37–48
Pilone G Bet al 1974 Chromosome location of the genes for 28S, 18S and 5S ribosomal RNA inTriturus marmoratus;Chromosoma 49 135–153
Pimpinelli S, Gatti M and De Mareo A 1975 Evidence for heterogeneity in heterochromatin ofDrosophila melanogaster;Nature (London) 256 335–337
Prescott D M 1970 The structure and replication of eukaryotic chromosome;Adv. Cell Biol. 1 57–117
Prescott D M (ed.) 1974Methods in Cell Biology Vol. 8, (New York: Academic Press)
Price H J 1976 Evolution of DNA content in higher plants;Bot. Rev. 42 27–52
Rae P M M 1972 The distribution of repetitive DNA sequences in chromosomes;Adv. Cell and Mol. Biol. (ed. E J Du Praw) (New York: Academic Press) Vol. 2 pp 111–149
Raff R A and Mahler H R 1972 The nonsymbiotic origin of mitochondria;Science 177 575–582
Ranjekar P K, Lafontaine J G and Pallota D 1974 Characterization of repetitive DNA in rye (Secale cereale) ;Chromosoma 48 427–440
Ranjekar P K, Pallota D and Lafontaine J G 1976 Analysis of genomes of plants—characterization of repetitive DNA in barley and wheat;Biochem. Biophys. Acta 425 30–40
Rees H 1972 DNA in higher plants;Brookhaven Symp. Biol. 23 394–418
Reinert J and Ursprung H (eds.) 1971Origin and Continuity of Cell Organelles, (Berlin: Springer-Verlag)
Remsen C C, Watson S W, Waterbury J B and Truper H G 1968 Fine structure ofEctothiorhodospora mobilis Pelsh;J. Bacteriol. 19 2374–2398
Riley R 1960 The diplodization of polyploid wheat;Heredity 15 407–429
Ris H and Plaut W 1962 infrastructure of DNA containing areas in the chloroplasts ofChlamydomonas;J. Cell Biol. 13 383–391
Ris H 1971 Chromosome structure.Topics in Cell Biology: Inheritance and Evolution (New York: Harper and Row) pp. 52–60
Robertson J D 1964 Unit membranes: a review with recent new studies of experimental alterations and a new subunit structure in synaptic membranes inCellular membranes in development ed. M Loone (New York: Academic Press). pp. 131–189
Roodyn D B and Wilkie D 1968The Biogenesis of mitochondria (London: Methuen)
Ruderman J K, Baglioni C and Gross P R 1974 Histone mRNA and histone synthesis during embryogenesis;Nature (London) 247 36–38
Saccone C and Quagliariello E 1975 Biochemical studies of mitochondrial transcription and translation;Int. Rev. Cytol. 43 125–165
Sager R and Kitchin R 1975 Selective silencing of eukaryotic DNA;Science (Wash.) 189 426- 433
Sagan L 1967 On the origin of mitosing cells;J. Theor. Biol. 14 225–274
Sanyal B and Sharma A 1972 Cytological studies on Indian Cyperaceae I. Tribe Scirpeae;Cytologia 37 13–32
Scarano E 1973 DNA methylation;Nature (London) 246 539
Schmid M, Vogel W and Krone W 1975 Attraction between centric heterochromatin of human chromosomes;Cytogenet. Cell Genet. 15 66–80
Schnepf E 1966 Organellen-reduplication und Zell-Kompartimentierung inProblem der biologischen reduplikation ed. P Sitte (Berlin: Springer-Verlag) pp. 372–393
Schnepf E and Brown R M Jr 1971 On relationships between endosymbiosis and the origin of plastids and mitochondria;Origin and continuity of cell organelles eds J Reinert and H Ursprung (Berlin: Springer-Verlag) Vol. 2, pp. 299–322
Schwarzacher H G 1976Chromosomes (Berlin: Springer-Verlag)
Schwartz A G and Taylor J H 1974 Repeated sequences in the DNA of the eukaryotic genome;Chromosoma 49 1–15
Sen S 1974a Differentiated nuclei and elucidation of chromosomal control of differentiation;Nucleus 17 40
Sen S 1974b Nature and behaviour of B chromosomes inAllium stracheyii andUrginea indica;Cytologia 39 245–251
Sevaljevic L, Krtolica K and Konstanlinovic M 1976 Embryonic stage related properties of sea urchin embryo chromatin;Biochim. Biophys. Acta 425 76–83
Sharma A and Talukder G 1974Laboratory Procedures in Human Genetics, I (Chromosome Methodology) (Nucleus, Calcutta)
Sharma A K 1955 Cytology of some members of Commelinaceae and its bearing on the interpretation of phylogeny;Genetica 27 323–363
Sharma A K 1956 A new concept of speciation in plants;Caryologia 9 93–130
Sharma A K 1969 Evolution of structure and behaviour of chromosomes;Nucleus 12 86–92
Sharma A K 1972a Polyploidy and chromosome size,Chromosomes Today eds C D Darlington and K R Lewis (London: Oliver and Boyd.) Vol. 3, pp. 248–252
Sharma A K 1972b Dynamicity of chromosomes—understanding and application;J. Indian Sci. Res. 31 545–546
Sharma A K 1973 A quarter century with chromosomes, Presidential Address Botany Section, 60th Indian Science Congress;Proc. Indian Sc. Congr. II, 123–132
Sharma A K 1974 Plant Cytogenetics inThe Cell Nucleus ed. H Busch (New York: Academic Press)2 264–292
Sharma A K 1975a The concept of chromosome dynamism;Nucleus 18 93–97
Sharma A K 1975b Chromosome banding and repeated DNA;J. Indian Bot. Soc. 54 1–8
Sharma A K 1976 A new look at chromosome and its evolution,Proc. Indian Nat. Sci. Acad. (Silver Jubilee Medal Mem. Lecture)B42 12–24
Sharma A K 1977 Evidence of dynamism as a basis of chromosomal control of genetic reactions;Nucleus 20 4–10
Sharma A K and Aiyangar H R 1961 Occurrence of B chromosomes in diploidAllium stracheyii and their elimination;Chromosoma 12 310–317
Sharma A K and Bal A K 1956 A cytological study of a few genera of Amaryllidaceae with a view to find out the basis of their phylogeny;Cytologia 21 329–352
Sharma A K and Bhattacharyya N K 1956 An investigation on the karyotype of the genusCrinum and its phylogeny;Genetica 28 263–296
Sharma A K and Bhattacharyya U C 1962 A cytological study of the factors influencing evolution inAgave;La Cellule 62 258–279
Sharma A K and Das N K 1954 Study of karyotypes and their alteration in Aroids;Agron. Lusit. 16 23–48
Sharma A K and Ghosh C 1954 Further investigation on the cytology of the family Amaryllidaceae and its bearing on the interpretation of its phylogeny;Genet. Iber. 6 71–100
Sharma A K and Mookerjea A 1954 Induction of division in cells—a study of the causal factors involved;Bull. Bot. Soc. G. C. Bose Mem. 8 24–100
Sharma A K and Roy M 1956 Chemical constitution and enzyme activity of chromosomes and related structures;La Cellule 58 109–133
Sharma A Kand Sharma A 1956 Fixity in chromosome number of plants;Nature (London) 177 335–336
Sharma A K and Sharma A1958 Recent advances in the study of chromosome structure;Bot Rev. 24 511–549
Sharma A K and Sharma A 1959 Chromosomal alterations in relation to speciation;Bot. Rev 25 514–544
Sin V T 1975 Developmental stages in the nonhistone proteins of chromatin from the salivary glands ofCalliphora stygia;Insect. Biochem. 5 845–853
Smith D, Muscatine L and Lewis D 1969 Carbohydrate movement from centotropus to heterotropus in parasitic and mutualistic symbiosis;Biol. Rev. 44 17–90
Smith G P 1976 Evolution of repeated DNA sequences by unequal crossing over;Science (Wash.) 191 528–535
Sobell H M 1973 Symmetry in protein nucleic acid interaction and its genetic implications;Adv Genet. 17 411–490
Soyer M O and Haapala O K 1974 Division and function of dinofiagellate chromosomes;J. Microscopia 19 137–146
Sparrow A H and Naumann A F 1974 Evolutionary changes in genome and chromosome size and DNA content in the grasses;Brookhaven Symp. Biol. 25 367–389
Sparrow A H and Nauman A F 1976 Evolution of genome size by DNA doublings;Science 192 524
Sparrow A H, Proue H J and Underbrink A G 1972 A survey of DNA content per cell and per chromosome of prokaryotic and eukaryotic organisms: some evolutionary considerations;Brookhaven Symp. Biol. 23 451–494
Stainer R Y 1970Symp. Soc. Gen. Microbiol. 20 1–38
Stebbins G L Jr 1971Chromosomal evolution in higher plants (London: Edward Arnold)
Steffenson D M and Wimber D E 1972 Hybridization of nucleic acid to chromosomes inNucleic acid hybridization in the study of chromosomes ed. H UpsprungResults and Problems of Cell Differentiation 3 47–63
Stein G S, Spelsberg T C and Kleinsmith L J 1974 Non-histone chromosomal proteins and gene regulation;Science 183 817–824
Stein G S, Stein I S and Kleinsmith L J 1975 Chromosome proteins and gene regulation;Sci. Am. 232 47–57
Stubbe W 1971 Origin and continuity of plastids inOrigin and Continuity of Cell Organelles eds J Reinert and H Ursprung (Berlin: Springer-Verlag) Vol. 2, pp. 64–68
Stutz E and Noll H 1967 Characterization of cytoplasmic and chloroplast polysomes in plants: evidence of three classes of ribosomal RNA in nature;Proc. Nat. Acad. Sci. (Wash.) 57 774–781
Swift M 1962 Nucleic acids and cell morphology of dipteran salivary glands.The Molecular control of cellular activity ed. J M Allen (New York: McGraw Hill) 73–125
Swift H 1965a Molecular morphology of the chromosomes inThe Chromosome: Structural and function aspects in vitro (Baltimore: William and Wilkins) Vol.1, p. 26.
Swift H 1965b Nucleic acids of mitochondria and chloroplasts;Am. Nat. 99 201–227
Szarski H 1976 Cell size and nuclear DNA content in vertebrates;Int. Rev. Cytol. 44 99–111
Takehisa S 1976 Negative heterochromatin, positive heterochromatin and chromosome condensation inVicia faba;Experientia 32 303–304
Tartof K D 1975 Redundant genes;Ann. Rev. Genet. 9 355–386
Tartof K D and Perry R P 1970 The 5S RNA genes ofDrosophila melanogaster;J. Molec. Biol. 51 171–183
Tashiro T and Kurokawa M 1975 A contribution of nonhistone proteins in the conformation of chromatin;Eur. J. Biochem. 60 569–577
Taylor F J R 1976 Autogenous theory of the origin of eukaryotes;Taxon 25 377–390
Taylor J H 1974 Units of DNA replication in eukaryotes;Int. Rev. Cytol. 37 1–20
Timmis J N, Ingle J, Sinclair J and Jones R N 1975 The genomic quality of rye B chromosomes;J. Exp. Bot. 26 367–378
Tobgy H A 1943 A cytological study ofCrepis fuliginosa, C. neglecta and theirF l hybrids and their bearing on the phylogenetic reduction in chromosome number;J. Genet. 45 67–111
Tobler H 1975 Occurrence and developmental significance of gene amplification inThe biochemistry of animal development (New York: Academic Press) Vol. 3, p. 91
Trembath M K, Monn B. C, Kellerman G M and Linnare A W 1975 Biogenesis of mitochondria;Mol. Gen. Genet. 140 333–337
Tschermak-Woess E 1971 EndomitozeHandbook altgem. Pathol. (Berlin: Springer-Verlag)
Tzagoloff A, Akai A and Needleman R B 1975 Assembly of the mitochondrial membrane systems;J. Biol. Chem. 250 8228–8235
Van Oostveldt P and Van Purijs R 1976 Underreplication of repetitive DNA in polyploid cells ofPisum sativum;Exptl. Cell Res. 98 210
Varsharsky Aet al 1976 Structure of chromosomal deoxyribouncleoprotein free DNA in sheared chromatin;Mol. Biol. 10 35–54
Vig B R 1975 Chromatin nuclear membrane attachment in relation to DNA replication and chromosome aberrations;J. Theor. Biol. 54 191–199
Vosa C G 1973 Heterochromatic recognition and analysis of chromosome variation inScilla sibirica;Chromosoma 43 269
Walker P M B 1971 Origin of satellite DNA;Nature (London) 229 306–308
Walker P M B, Flamm W G and McLaren A 1969Handbook of Molecular Cytology ed. A Lima-De-Faria (New York: American Elsevier) p. 52
Wallace H and Birnsteil M L 1966 Ribosomal cistrons and the nucleolar organizer;Biochem. Biophys. Acta 114 296
Wallis B 1971 Plastid inheritance and mutations inStructure and function of chloroplasts ed. M Gibbs (Berlin: Springer-Verlag) pp. 51–88
Wilkie D 1973 Cytoplasmic genetic systems in eukaryotic cells;Br. Med. Bull. 29 263–268
Wimber D E, Patricia A D, Steffenson D M and Prensky W 1974 Localization of 5S rRNA genes inZea mays by RNA-DNA hydridizationin situ;Chromosoma 47 353–359
Yunis J J and Yasmineh W G 1971 Heterochromatin satellite DNA and cell function;Science (Wash.) 174 1200–1209
Yunis J J and Yasmineh W G 1972 Model for mammalian constitutive heterochromatin;Adv. Cell and Mol. Biol. ed. E J Du Praw (New York: Academic Press) p. 2
Zhdanov V M 1975 Integration of viral genome;Nature (London) 256 471–473
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Based on an Academy Lecture delivered in Calcutta in March 1978
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Sharma, A.K. Change in chromosome concept. Proc. Indian Acad. Sci. 87, 161–190 (1978). https://doi.org/10.1007/BF03048913
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DOI: https://doi.org/10.1007/BF03048913