00:01
We need to put the genotype and phenotype ratios of the offspring for this cross.
00:06
So we're looking at eye colour.
00:08
Okay, so brown is the dominant trait, and the other is going to be something else.
00:17
It doesn't say what it is here, but probably blue.
00:21
Okay, and i know that brown is the dominant trait because karen is heterozygous, which means she gets one of each allele, and she has brown eyes.
00:30
So we've got one homozygous individual and one heterozygous.
00:37
So because this person here has brown eyes, that's how i know brown is dominant.
00:42
So how do we do this cross? well, let's do a pun it square.
00:47
We put the parental alleles on the outside, so this is the outside of the square, and then inside the square, we're going to combine these to see what the outcomes might be...