[js1138]

I don't think this is a mutation in the usual sense of the word, although I would defer to the biologists on this one. I do know from my background in special education that people with anomalous chrosomes are usually, but not always, sterile.

Sex is not always fixed in animals. The clownfish father in "Finding Nemo" would, in real life, have turned into a female upon the death of his mate.

[GovernmentShrinker]

I recall reading years ago about a case (in Russia, I think) of an intersexed person who had both fathered a child, and given birth to one.

[VxH]

>>I don't think this is a mutation in the usual sense of the word,

All genetic traits are mutations.