00:01
In this question, we're looking at a homologous pair of chromosomes, and these chromosomes are carrying genes, two different alleles of genes for skin complexion and for hair color.
00:19
And they've represented one set of homologous chromosomes in green, in the other set of the other homologue in red.
00:30
There has been a crossing over event, as you can see here, where some of the red chromosome has been shared with the green chromosome and some of the green chromosome has been shared with a red chromosome.
00:44
And i've also represented the genes that we're looking at in different colors.
00:51
So the first gene here in the red of the top gene, this actually represents a skin complexion that has no freckles, and i'm going to denote that is n, and blonde hair down on the bottom, and i'm going to denote that with a d.
01:09
And the other chromosome, the green chromosome, carries a gene that does have freckles for skin complexions, that's the other allele, and has black hair down at the bottom.
01:22
So that's the other allele for the hair color...