00:01
The difference between sex -linked traits and sex -limited traits has to do with one is more associated with the chromosomes, while the other is more associated with hormone levels.
00:11
So sex -linked traits have to specifically do with the x chromosome.
00:20
And that's because men who have an x and a y chromosome, there isn't always an analogous gene for all of the genes on the x chromosome on the y chromosome.
00:30
So they express different genes, and the y chromosome doesn't have all of the genes that are on the x chromosome.
00:38
And we can see that in the classic example of colorblindness.
00:42
So here we have two x's, and this is for a woman, and on one of them, she has a dominant allele for seeing with color, and on the other, she has a recessive allele for colorblindness.
00:55
And because she has two x chromosomes, she can be heterozygous for this trait, and she won't have, she won't be colorblind.
01:05
She'll still be able to see with color because she has that dominant allele on the other x chromosome...