Help with genetics full pts show work please?
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Help with genetics full pts show work please?

[From: ] [author: ] [Date: 14-01-23] [Hit: ]
and preimplantation embryonic lethality in homozygotes. The Yellow coat colour allele is a recessive lethal in mice. When mice are heterozygous (Ag/Ay) the mice have yellow fur (2 marks).a. If two yellow mice are crossed together, what will be the proportion of agouti and yellow mice in the offspring?......
4. Lethal yellow (Ay) is a mutation at the mouse agouti (Ag) locus that is associated with an all-yellow coat color, obesity, diabetes, tumors in heterozygotes, and preimplantation embryonic lethality in homozygotes. The Yellow coat colour allele is a recessive lethal in mice. When mice are heterozygous (Ag/Ay) the mice have yellow fur (2 marks).
a. If two yellow mice are crossed together, what will be the proportion of agouti and yellow mice in the offspring?
b. A geneticist examined a number of litters from agouti x agouti mice and compared them to litters of yellow x yellow mice. She observed 200 pups in the agouti x agouti litters. How many pups would you expect to find in the yellow x yellow litters?

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a. AgAy x AgAy = AgAg, AgAy, AgAy, AyAy (lethal)
2:1 ration of yellow:agouti. so Agouti: 1/3 and yellow: 2/3

B. AgAy x AgAy= again 2:1 ratio of yellow:agouti
Since the AyAy genotype is lethal, we would expect 25% lower progeny when compared to the agouti x agouti cross. So .25(200)= 50 and 200-50(lethal genotypes)= 150. We would expected 150 progeny from this cross
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