00:01
Okay, we're looking across between some fruit flies.
00:04
We see it's sex -linked, and the wild type is red, and it's dominant to recessive white.
00:11
We have a cross between a male fruit fly with red eyes and a female with white eyes.
00:17
What's the chance? what's going to be true? a, all males will have red eyes.
00:23
B, all females will have white eyes.
00:26
C, all males will have white eyes.
00:28
Or d, there's a 50 % chance that females will have red eyes.
00:33
Okay.
00:34
So if it's sex -linked, that means we're looking at something on the x chromosome here.
00:38
So the male has the red wild type, which is dominant.
00:45
So he's going to have xw, y, that's his genotype.
00:50
And he's been crossed with a white -eyed female, so she's going to be xw.
00:55
Xw...