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Cytological observations on mitotic and meiotic pairing in males ofDrosophila melanogaster withIn(1)sc 4 sc 8

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Abstract

A cytological study has been carried out on the pairing of the XY chromosomes in somatic cells and in spermatocytes of larvae ofDrosophila melanogaster. Two strains have been studied: one a control strain and the other a carrier of theIn(1)sc 4 sc 8 inversion on the X chromosome. The data obtained seem to indicate that the absence of the greater region of homology between XY, caused by the presence of theIn(1)sc 4 sc 8 inversion, results in an approximately equal reduction in the frequencies of mitotic and meiotic pairing of XY. The short arm of the Y chromosome shows marked differences in the pairing with the X chromosome, compared with the control, whereas the long arm shows no variations.

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Authors and Affiliations

  1. Centro di Genetica Evoluzionistica (CNR), Istituto di Genetica dell'Università di Roma, Roma, Italy

    A. De Marco & R. Cozzi

  2. Istituto Superiore di Sanità, Roma

    L. Toti

Authors
  1. A. De Marco
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  2. R. Cozzi
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  3. L. Toti
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De Marco, A., Cozzi, R. & Toti, L. Cytological observations on mitotic and meiotic pairing in males ofDrosophila melanogaster withIn(1)sc 4 sc 8 . Genetica 45, 489–496 (1975). https://doi.org/10.1007/BF01772871

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  • DOI: https://doi.org/10.1007/BF01772871

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