Male genes: X-pelled or X-cluded?
Two recent studies by Parisi et al. and Ranz et al., catalogue sex differences in gene expression across the whole genome of the fruit fly Drosophila melanogaster. Both report striking associations of sex-biased gene expression with the X chromosome. Genes with male-biased expression are depauperate on the X chromosome, whereas genes with female-biased expression show weaker evidence of being in excess. A number of evolutionary hypotheses for the expulsion or exclusion of male-biased genes from the X chromosome have been suggested. None is entirely consistent with the available evidence.
Rogers
David W
DW
The Galton Laboratory, University College London, London, UK.
Carr
Martin
M
Pomiankowski
Andrew
A
D000818:Animals; D005075:Biological Evolution; D004303:Dosage Compensation, Genetic; D004331:Drosophila melanogaster / Q000235:genetics; D005260:Female; D015870:Gene Expression; D017344:Genes, Insect; D023281:Genomics; D008297:Male; D009154:Mutation; D012727:Sex Characteristics; D014960:X Chromosome / Q000235:genetics*