SEX CHROMOSOME MEIOTIC DRIVE SYSTEMS IN DROSOPHILA MELANOGASTER I. ABNORMAL SPERMATID DEVELOPMENT IN MALES WITH A HETEROCHROMATIN-DEFICIENT X CHROMOSOME (sc 4 sc 8)
Open Access
- 1 April 1975
- journal article
- research article
- Published by Oxford University Press (OUP) in Genetics
- Vol. 79 (4) , 613-634
- https://doi.org/10.1093/genetics/79.4.613
Abstract
The meiotic drive characteristics of the In(1)sc4Lsc8R/Y system have been examined by genetic analysis and by light and electron microscopy. sc4sc8/Y males show a direct correlation between nondisjunction frequency and meiotic drive. Temperature-shift experiments reveal that the temperature-sensitive period for nondisjunction is at meiosis, whereas that for meiotic drive has both meiotic and post-meiotic components. Cytological analyses in the light and electron microscopes reveal failures in spermiogenesis in the testes of sc 4 sc 8 males. The extent of abnormal spermatid development increases as nondisjunction becomes more extreme.Keywords
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