00:01
In order to answer this question, let's talk about inheritance.
00:02
It says, code colors in cats is determined by genes at several different loxite.
00:08
It says at one locus, one on the x chromosome, one allele encodes black fur, another alim encodes orange fur.
00:16
So you have, this is a black food and this is the orange form.
00:23
Now it says females can be black, orange, or a mixture of orange in black called calic.
00:29
Males are either black or orange.
00:30
Bill has a female calico cat named patches.
00:34
So, in this case, the genotype for patches is going to be like this.
00:41
Okay? and it says one night, patches escapes from bill's house, spends the night out and mates with a straight male.
00:52
Patches later gives birth to the following kittens.
00:56
So you have here that genotype for the father, okay? we don't know actually the genotype for this.
01:02
For this father, but it says that that patches gives birth to the following kittens.
01:08
You have one orange male, okay, one black male, and two calico females, and also one orange female.
01:16
So let's focus on the orange female here.
01:20
The orange female has this genotype here.
01:22
Okay, so the baby cat with this genotype here, this is her genotype, and remember that one organism inherits one allele from the mother and one all the father.
01:32
So in this case, this ovaleal came from patches and this ovalele came from the father.
01:37
So it means that the father is orange.
01:40
Now it says, give the genotypes of patches.
01:44
So this is the genotype for patches.
01:47
And it says also her kittens and the stray male with which patches made it clearly indicate the genotype and phenotype of each.
01:55
So in this case, this is the genotype for patches and this is the genotype for the stray male...