1.
Trends Genet
; 25(6): 270-7, 2009 Jun.
Article
in English
| MEDLINE
| ID: mdl-19443075
ABSTRACT
Classically, Y chromosomes are thought to originate from X chromosomes through a process of degeneration and gene loss. Now, the availability of 12 Drosophila genomes provides an opportunity to study the origin and evolution of Y chromosomes in an informative phylogenetic context. Surprisingly, the majority of Drosophila Y-linked genes are recent acquisitions from autosomes and Y chromosome gene gains are more frequent than gene losses. Moreover, the Drosophila pseudoobscura Y chromosome lacks homology with the Y of most Drosophila species. Thus, the Drosophila Y has a different evolutionary history from canonical Y chromosomes (such as the mammalian Y) and it also might have a different origin.
Subject(s)
Drosophila/genetics , Evolution, Molecular , Y Chromosome/genetics , Animals
2.
Mol Biol Evol
; 18(6): 1139-42, 2001 Jun.
Article
in English
| MEDLINE
| ID: mdl-11371603