The association of non-homologous parts of chromosomes in the mid-prophase of meiosis in zea mays
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Association of chromosomes at pachytene in Zea mays is 2-by-2 whether or not the parts associated are homologous.
Evidence for non-homologous association of parts of chromosomes has been obtained from monoploids, diploids, monosomics, trisomics, deficiencies, inversions, translocations, ring-shaped chromosomes, “asynaptic” plants and so-called “B-type” chromosomes.
In many cases, the non-homologous association at pachytene appears to be as intimate as homologous association.
Non-homologous association, present at pachytene, rarely continues into diakinesis.
Translocations probably result from the association of non-homologous parts of chromosomes.
KeywordsNormal Chromosome Spindle Fiber Univalent Chromosome Homologous Part Text Figure
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- Belling, J.: The attachment of chromosomes at the reduction division in flowering plants. J. Genet.18 177–205 (1927).Google Scholar
- —: The association of non-homologous parts in a chromosomal interchange in maize. Proc. 6. internat. Congr. Genetics2, 19–20 (1932b).Google Scholar
- Clausen, R. E.: Inheritance inNicotiana tabacum. X. Carminecoral variegation. Cytologia1, 358–368 (1930).Google Scholar
- —: Inheritance inNicotiana tabacum. XII. Transmission features of carmine-coral variegation. Z. Züchtg, A. Pflanzenzüchtg17, 108–115 (1931b).Google Scholar
- Creighton, H. B. andB. McClintock: Cytological evidence for 4-strand crossing over inZea mays. Proc. 6. internat. Congr. Genetics2, 392 (1932).Google Scholar
- Frost, H. B.: Chromosome-mutant types in stocks (Matthiola incana R. Br.). I. Characters due to extra chromosomes. J. Hered.18, 475–486 (1927).Google Scholar
- —: Trisomic inheritance of doubleness, complicated by lethals, inMatthiola incana. Proc. nat. Acad. Sci. U.S.A.17, 499 to 509 (1931).Google Scholar
- —: Cytological Observations of deficiencies involving known genes, translocations and an inversion inZea mays. Missouri Agricult exper. Stat. Bull163, 1–30 (1931).Google Scholar
- —: Cytological observations inZea on the intimate association of non-homologous parts of chromosomes in the mid-prophase of meiosis and its relation to diakinesis configurations. Proc. 6. internat. Congr. Genetics2, 126–128 (1932a).Google Scholar
- Newton, W. C. F. andC. D. Darlington: Meiosis in polyploids. I. Triploid and pentaploid tulips. J. Genet.21, 1–15 (1929).Google Scholar
- Randolph, L. F.: Types of supernumerary chromosomes in maize. Anat. Rec.41, 102 (1928).Google Scholar