Question

Two animals with dark fur are crossed multiple times, and, after analyzing all of their offspring,...

Two animals with dark fur are crossed multiple times, and, after analyzing all of their offspring, the following numbers emerge: 71 dark, 47 grey, 8 white. Explain: - what kind of inheritance is this? - show the genotypes of the parents - show the genotypes for all three phenotypes of the offspring (GENETICS QUESTION)

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Answer #1

Answer

1. The inheritance is Incomplete dominance. In incomplete dominance, neither allele is dominant. Heterozygous condition have a blend of two traits and shows a third phenotype.

The cross is represented as follows. Assume Dark is heterozygous. D represent Grey and d represent white

Parents - Dark fur x Dark fur

Genotype - Dd x Dd

Gametes - D and d x D and d

Progeny -

Gametes D d
D

DD

Grey

Dd

Dark

d

Dd

Dark

dd

White

The Phenotypic ratio = 1 Greyk : 2 Dark : 1 White

2. Genotype of Parents - Dd and Dd

3. Genotype of offspring= DD - Grey, Dd - Dark, dd - White

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