question, what did everyone do for the chance of child having syndacytyl? did we know if she was homozygous ore heterozygous?
For some odd reason, I interpreted that question really bad, and thought the stem question was wrong. I thought it had originally said, the father and mother were normal, and so they must have been recessive for Syndactyly, although yet the daughter and the father were affected, so it didn't make sense to me... messed up on that one bad! No chance for that 75/75 now haha!
dont worry about it! im sure you'll make up the marks somewhere else! what do you think the answer would be? i was so confused!
It's autosomal dominant. Ruby's mother is normal. Therefore she's homozygous recessive (let's call that ss)
Therefore Ruby, who has the trait must be (Ss)
Jonah is normal (ss)
So, punnet square, Ruby crossed with Jonah Ss x ss
There's a 1/2 chance that the child will have it.