00:02
In this problem, we're primarily trying to define what heritability means.
00:08
So heritability, as we talk about it in biology, is basically when you have some sort of trait that you can see in a parent.
00:19
And then you can also see it in the children that that parent has.
00:25
You can see different combinations of this.
00:29
And you can also see traits that are not heritable, things that are not passed.
00:34
So if we are really putting a definition to this heritability thing, it involves some genetic change or genetic, which is passed, from a parent to the child.
00:51
So we can talk about genotypes.
00:53
Let's say that we have some allele.
00:56
It's an a and let's say the parent.
01:00
Are both heterozygotes for this.
01:03
Well, we know that if this is a normal dominance recessive type, that if we pass down these alleles, depending on the combination that we have, either homozygous dominant or heterozygous or homozygous or homozygous recessive, that these phenotypes, these two phenotypes might be the same and this might be different, or maybe all three of them, are their own separate thing.
01:31
But the reason why the phenotypes are different, and you see these traits passed down in different capacities, is because of the genes.
01:41
So we know that heritability has to be because of a genetic factor.
01:48
It's highly affected by genes...