00:01
In short horn cattle, we have three different phenotypes.
00:04
The rowan color coloration, which is the brown and white on the left up there, which is the heterozygote, the red individual, and then the white individual.
00:13
The first cross that we're going to do with probability is seeing what happens when we cross two rowing cows together.
00:21
What happens, again, anything from the top comes down, anything from the side comes over.
00:26
And so what we end up with is this percentage in the punnet square.
00:34
We have one red possibility, two rowan possibilities, and one white possibility.
00:44
Now, when we cross a rowan cow with a red cow, the corresponding genotypes are as follows, two red possibilities and two rowan possibilities.
01:01
So here we'll add some color just to accentuate that.
01:06
And now we're going to ask ourselves the question, what is the probability that in the rowan rawn mating session that no red calves are born? and in this case, the only instance that we don't have any red is going to be one -fourth, though if this is is asking for anything other than red, that would be three -fourths because you'd also have to include the two rowan individuals.
01:38
In our rowan red cow mating session, there are no instances where there are calves with absolutely no red on them.
01:49
But again, if this is looking for completely red, this would be two -fourths because rowan wouldn't count as that red.
01:58
If we're looking at red or white, we would have to add the two.
02:03
So we have one possibility out of four for it to be a red individual and one possibility out of four for it to be a white individual.
02:10
So that gives us half.
02:12
And in our rowan red mating session, we have two out of four that are red...