doi: 10.1002/bies.950180410.
Is the Y chromosome of Drosophila an evolved supernumerary chromosome?
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- PMID: 8967900
- DOI: 10.1002/bies.950180410
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Is the Y chromosome of Drosophila an evolved supernumerary chromosome?
Bioessays.
1996 Apr.
Free article
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.
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