Meiosis in Drosophila melanogaster. V. Univalent behavior in In(1)sc4lsc8r/BsY males

Univalent behavior during meiosis has been examined in Drosophila melanogaster males possessing the In(1)sc4Lsc8R X chromosome using light microscopy and serial section electron microscopy. Males from two stocks, displaying high (0.40) and low (0.14) frequencies of sex chromosome nondisjunction, hav...

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Bibliographic Details
Published inCanadian journal of genetics and cytology Vol. 26; no. 4; pp. 445 - 458
Main Authors Lin, H.P.P, Ault, J.G, Kimble, M, Church, K
Format Journal Article
LanguageEnglish
Published Canada 01.08.1984
Subjects
animal breeding
animal genetics
Animals
arthropods
Cell Nucleolus - ultrastructure
Drosophila melanogaster - physiology
entomology
Male
Meiosis
Microscopy, Electron
Nondisjunction, Genetic
Sex Chromosomes - physiology
Spermatogenesis
Spindle Apparatus - physiology
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Summary:Univalent behavior during meiosis has been examined in Drosophila melanogaster males possessing the In(1)sc4Lsc8R X chromosome using light microscopy and serial section electron microscopy. Males from two stocks, displaying high (0.40) and low (0.14) frequencies of sex chromosome nondisjunction, have been investigated. The results demonstrate that (i) sex chromosomes are more intimately paired during prometaphase I in males from the low nondisjunction stock than in males from the high nondisjunction stock, and (ii) the univalents are distributed to the poles in an unbiased manner during meiosis rather than by directed segregation of both univalents to the same pole as previously determined for other In(1)sc4Lsc8R/Y males.
ISSN:0008-4093
DOI:10.1139/g84-072