Hmm.. The only thing I remember reading about those sorts of things was about females with WW chromosomes. There was a boa who gave birth on her own(no male) and all of the babies born were WW instead of WZ. Of course the testing wasn't really done that well, the snake was still bred during the time, but the babies all only carried her genes and the recessive morph despite the males not carrying the recessive trait. Still would be nice to see if she does it again without males present.

http://www.sciencedaily.com/releases...1103111210.htm

random, but sort of related. Chromosomes do weird things.