Question

In a test cross AaBb* aabb, 90% of the progeny are like parents. Determine: a) the progeny type for the rest of the population? b) are the genes linked? c) is there any crossing over between the genes?\

Answer 1

A plant with genotype AaBb is crossed with another plant with genotype aabb. The genotype of the progeny will be AaBb, Aabb, aaBb, aabb. This cross is called a test cross. The crossing of F1 individual with a homozygous recessive parent is called Test cross. It is used to know, whether F1 is homozygous or heterozygous.

So, the correct option is ‘AaBb,Aabb, aaBb, aabb.

ANSWER

A plant with genotype AaBb is crossed with another plant with genotype aabb. The genotype of the progeny will be AaBb, Aabb, aaBb, aabb. This cross is called a test cross. The crossing of F1 individual with a homozygous recessive parent is called Test cross. It is used to know, whether F1 is homozygous or heterozygous.

So, the correct option is ‘AaBb,Aabb, aaBb, aabb.