In cats, curled ears result from an allele, cu, that is dominant over an allele, cu, for normal ears. black color results from an independently assorting allele, g, that is dominant over an allele for gray, g. a gray cat homozygous for curled ears is mated with a homozygous black cat with normal ears. all the f1 cats are black and have curled ears. what phenotypes and proportions are expected from the two crosses?

Genotype  

GGCuCu : GGCucu: GgCuCu: GgCucu : GGcucu: Ggcucu: ggCuCu: ggCucu: ggcucu

1 : 2: 4: 4: 2: 2: 2: 1

Phenotypic ration    

Black & curled ears : Black & normal ears: Gray & curled ears : Grey & normal years

11: 4: 4: 1

Explanation:

Given -

Curled ears  allele, Cu is dominant over an allele for normal ears , cu.

Also Black color (G) is dominant over allele for gray color (g)

Genotype of parent

gray cat homozygous for curled ears - ggCuCu

homozygous black cat with normal ears- GGcucu

offsprings produced were having genotype - GgCucu

Now cross is carried out between F1 progeny and these are as follows -

GgCucu * GgCucu

Please see the attached file

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