Blog Source: www.justaguything.com
The Y chromosome has a gene called SRY that triggers the development of testis and produces male hormones that determine maleness. A mere 300 million years ago, the male chromosome had 1400 genes on it. Now that number is down to 45. ...
Blog Source: thepoormouth.blogspot.com
The male Y chromosome has a gene (SRY) which switches on the development of testis and thus determines maleness. She said it was not known what would happen once the Y chromosome disappeared. "Humans can't become parthenogenetic, ...