> As a result of the rapid evolution of the Y chromosome, would it not be
> possible for males to have evolved to fill different niches within a small
> scale tribal social group?

Didn't I read somewhere recently of a (modern?) variation on this theme
where the Y chromosome is found to be more geographically localized than X
because of this idea that men tend to live and work not far from their
families, with their wives relocating to accommodate?  I thought there was a
fancy (but apparently not catchy!) name for this, but is there any truth to
it?
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