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

April 25, 2020 | Education

| **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%

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.