00:01
In order to answer this question, let's talk about inheritance.
00:04
It is apply what you have learned about x -link genes here.
00:08
In chickens, it is the females that have two different sex chromosomes.
00:11
So in this case, females are z -w, like this.
00:21
Okay? and males have two z chromosomes.
00:31
Okay? and it says, a z -link gene controls the pattern of feathers with a dominant b, a little causing a barred pattern, and the aggressive be a little causing non -barred feathers.
00:42
So in this case, when you have the dominant, the homocygous domino or the heterocygous in males, or just like this in females, you're going to produce a bird pattern here.
01:01
Okay? and when you have the homocygo excessive, you're going to get no bird like this.
01:15
Now, it says, from which of the following process, would for which is the following process would and half of the son be barred and the other half be non -bart and half of the daughters be barred and the other half be non -barred.
01:32
So if you just want some non -barred offering or non -barred males may offer, then this is what you want or some offering.
01:42
Now remember that any organism here is one a little from each parent.
01:45
So in this case this offering here has to which is a different from this parent and the second came from the second part.
01:56
So this is the female and this is the male parent.
02:02
Okay.
02:03
So one is a b is coming from the mother...