WHY DO FEMALES PREFER MALES OF THEIR OWN SPECIES?

October 2007

Seems like a daft question, but the genetic bases of these effects can be quite simple. This article from Science (subscription needed to get past abstract) gives an example from pied flycatchers and shows that the genes are sex-linked. There’s also this summary in the same issue (same rules apply). Thanks to Per Smiseth for this.

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