- Joined
- Sep 10, 2008
- Messages
- 625
- Reaction score
- 1
I don't know what the deal is but I don't see how they're getting to this answer...
Question:
A women carries a sex-linked lethal gene that causes spontaneous abortions. She has six children. How many of her children would you expect to be boys?
Answer:
Two
I'm at a loss here. Let (a) = the gene for abortion. If you do the cross of a carrier female, XaX, with a normal male, XY, you get:
XaX, XX, XaY, XY. So 50% are aborted. I don't know where to go from here.
Question:
A women carries a sex-linked lethal gene that causes spontaneous abortions. She has six children. How many of her children would you expect to be boys?
Answer:
Two
I'm at a loss here. Let (a) = the gene for abortion. If you do the cross of a carrier female, XaX, with a normal male, XY, you get:
XaX, XX, XaY, XY. So 50% are aborted. I don't know where to go from here.