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Re: Question about avian sex chromosomes
Quoting David Marjanovic <firstname.lastname@example.org>:
> > How do fish do being male and female without sex chromosomes?
> Now different organisms have
> different master switches. I guess birds have theirs on the female
> chromosome... which is called either W or Z, I forgot.
Male birds have two W chromosomes; females have a W and a Z. As I understand
it, the "default" development pathway is female in birds as well. The
difference is that a double dose of whatever it is on the W chromosome is
required to switch to the male developmental track.
Department of Linguistics
University of Michigan