00:02
So determining genotype of individuals involved, in this case, all of the parental f1 and f2 generations, we're going to be doing this by looking at their phenotype.
00:13
And we're told phenotype is all about how many hairs that they have produced.
00:17
So for the parental generation, we have one parent who has all 60 hairs, which seems to be the maximum, and one parent who has zero, which seems to be the minimum.
00:30
So then our f1 generation cuts the difference and they all have 30 hairs.
00:35
But then we look at the f1 generation, it gets a little more complicated because we see that 1 out of the 16 have 60 hairs.
00:44
4 out of the 16 have 45 hairs.
00:52
6 out of the 16 have 30.
00:59
4 out of the 16 have 15 and then 1 out of the 16 has 0 hairs.
01:05
So we have a lot more options when we get to the f1 generation.
01:10
So the way that we're going to break this down is by focusing on the f2 generation, the one that has the most information.
01:16
And here i see five different phenotypes.
01:22
The place where you're going to get five different phenotypes is most likely going to be if we have two genes.
01:29
Because if we're looking at this with two genes, that would mean that say the phenotype that has no hairs, right? the least amount of hairs that we can have the minimum, probably is the one where you have no dominant alleles.
01:43
So let's say if we have two genes, call them a and b, this is the one that is homozygous recessive for a and b...