Fig. 6

Functional specialization of Y-linked genes in flies. a Expression patterns of putative Y-linked genes with homologs in D. melanogaster in multiple D. melanogaster tissues. b Expression patterns of putative Y-linked genes in male and female head, and testis and ovaries for different species. Expression values were calculated as TPM (transcript per million) and row normalized to obtain z-scores with a mean of 0 and standard deviation of 1, using the built-in scale = ’row’ argument in the heatmap.2 function from the package gplots in R