Question

(a) Guinea pig having black colour when crossed with guinea pig having same colour produced 80 offsprings out of which 60 were black and 20 were white. Now, find out
(i) What is the possible genotype of the guinea pig?
(ii) Which trait is dominant and which trait is recessive?
(iii) What is the cross called as and what is its phenotypic ratio?

Answer 1

Answer:

(i) Possible genotype of the guinea pig : Bb X Bb

(ii) Black is dominant and white is recessive.

(iii) Monohybrid cross.

Phenotypic ratio = 3 : 1