In Drosophila more than 95% of the genes have remained on the same chromosome arm in 12 species that diverged 63 Myr ago.
This study finds that only a quarter of D. melanogaster Y linked genes are also Y-linked in these 12 species. Gene losses are known to play a major role in the evolution of Y chromosomes, but this study shows that in contrast with the mammalian Y, gene gains play an important role in the evolution of the Drosophila Y chromosome.
- Leonardo B. Koerich
- Xiaoyun Wang
- Antonio Bernardo Carvalho