00:02
Okay, in this question, we have two true breeding lines of these flowers.
00:07
So the first line, i'm going to give the genotype capital b, capital b, homozygous condition for dark blue.
00:19
This is going to be crossed with a true breeding line of white flowers.
00:25
So i'm going to give those the alleles capital w, capital w.
00:31
Well, when we cross these in the f1, of course, they're each going to get one allele from each parent.
00:39
So what we get is bw, and the color of that, we are told, is light blue, which is a shade between the dark blue and the white.
00:53
When we cross the f1s to get the f2s, what we find is a 1 to 2 to 1 ratio.
01:01
Ratio.
01:03
One dark blue for two light blue and one white.
01:17
So that one to two to one.
01:18
Well, this makes sense because when we cross bw times bw, one fourth of our boxes are going to have big b, big b...