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

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


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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cell Cycle
  • Crosses, Genetic
  • Drosophila melanogaster / genetics*
  • Drosophila melanogaster / physiology
  • Female
  • Male
  • Meiosis
  • Mutation
  • X Chromosome / physiology*