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. 1984;90(3):222-8.
doi: 10.1007/BF00292400.

Bivalent behavior in Drosophila melanogaster males containing the In(1)sc4Lsc8RX chromosome

J G Ault, H P Lin

Bivalent behavior in Drosophila melanogaster males containing the In(1)sc4Lsc8RX chromosome

J G Ault et al. Chromosoma. 1984.

Abstract

The sex chromosome bivalent was examined in Drosophila melanogaster males possessing the In(1)sc4Lsc8R X chromosome. Three-dimensional reconstructions from electron micrographs of serially cut thin sections were made. A large proportion of the kinetochores of In(1)sc4Lsc8R/Y bivalents did not face opposite poles during metaphase I and anaphase I. This suggests that In(1)sc4Lsc8R/Y bivalents may have difficulty achieving bipolar stability. Delay in achieving bipolar stability could contribute to the nondisjunctional behavior found in In(1)sc4Lsc8R/Y males.

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