Q. 55.0( 4 Votes )

In a certain species of animals, black fur (B) is dominant over brown fur (b). Show the possible ratio of genotypes and phenotypes of the offspring of the pure breeding different coloured parents.

Answer :

When a pure breeding with black fur (BB) animal species crossed with a pure-breeding with brown fur (bb) animal species, the offsprings are obtained as follows in F1 and F2 generation.


Thus,


Genotypic ratio = 1 (Homologous black fur) : 2 (Heterozygous black fur) : 1 (Homozygous brown fur)


Phenotypic ratio = 3 (Black fur) : 1 (Brown fur)


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