For the OP, actually, it would be a little more accurate to say that for the pairings listed above, the chance of each offspring carrying the gene listed is 50%. This doesn't mean you can expect that half will carry the gene and half wont. It can happen, but it might not. Over many many pairings, it would approach 50%, but these are small number statistics and they can vary a lot. Think of it more like flipping a coin - if you flip 3 heads in a row, the fourth flip still has a 50% chance of being heads or tails. Overall, you can estimate the overall odds of flipping all heads or all tails or anything in between also. I don't know if that makes any more sense at all or if I'm just confusing things more.![]()