00:01
So in this question, we're looking at the adherence pattern of coat color of two independent genes, and then we've tossed in a third one.
00:09
And so for a, we have these three different genes.
00:14
We have one, two, three, one, two, three.
00:19
This is going to be our a gene, our b, gene, our c.
00:24
Just do it a little chunk at a time.
00:27
For a, we do have a 9331.
00:30
And when we have a 9331 is two heterozygotes.
00:42
So you're going to have big a, little a, big b, little b, big a, big b, little b.
00:50
Now we have to throw in that third gene, the c.
00:53
Well, because there are no albinos, you know that there's at least one homozygous dominant, and the other one has another dominant allele and it doesn't really matter what that second one is.
01:04
And that's your answer for a.
01:06
Now let's look at b.
01:09
We see a 3 to 1 ratio of albino, right? so when we look at our alleles here, a 3 to 1 ratio means that you're going to have two heterozygots for your c.
01:26
Because we have a 3 to 1 ratio of abino.
01:28
Then we have kind of a 3 to 1 ratio after the albino of gray and yellow.
01:36
Well, to get our gray and yellows, we both have to have at least one dominant.
01:45
And then the other one is going to have to be, one of them is going to have to be homozygous dominant.
01:49
The other one can, it honestly doesn't matter what that other allele is to give you that 100%.
01:55
And then it's our bees that matter, right? if we have a big b, we're gray...