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Bioessays. 1996 Apr;18(4):317-23.

Is the Y chromosome of Drosophila an evolved supernumerary chromosome?

Author information

1
Department of Microbiology and Evolutionary Biology, Faculty of Science, Catholic University of Nijmegen, The Netherlands.

Abstract

The Y chromosomes of most Drosophila species are necessary for male fertility but they are not involved in sex determination. They have many puzzling properties that resemble the effects caused by B chromosomes. Classical genetic and molecular studies reveal substantial affinities between Y and B chromosomes and suggest that the Y chromosomes of Drosophila are not degenerated homologues of the X chromosomes, but rather that their Y chromosomes evolved as specialized supernumeraries similar to classical B chromosomes.

PMID:
8967900
DOI:
10.1002/bies.950180410
[Indexed for MEDLINE]

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