Black color of cats dominates fawn, and short coat dominates over long one. Purebred Persian cats (black longhair) and Siamese (fawn shorthair)

Black color of cats dominates fawn, and short coat dominates over long one. Purebred Persian cats (black longhair) and Siamese (fawn shorthair) were crossbreeding. The resulting hybrids crossed among themselves. 1) What is the probability (%) of getting a purebred Siamese kitten in F2? 2) What is the probability (%) of getting in F2 a kitten phenotypically similar to a Persian? 3) What is the probability (%) of getting a long-haired fawn kitten in F2?

Decision:

A – black color, and – fawn

In – short hair, in – long

We determine the genotypes of the parents, the types of gametes and write down the crossing pattern

R black, long coat

AAB

× fawn, short coat

aaBB

Gametes Ah, in a, b
F1 black, short coat AaBB

Answer:

1) 6.25%

2) 18.75%

3) 6.25%

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