Question

Heterozygosity/dominance of phenotype can be determined by

• A. Back cross
• B. Test cross
• C. Reciprocal cross
• D. Hybrid cross

Answer 1

The correct option is B Test cross

A.Back cross – Cross is made between F1 hybrid and any one of the parent is called Back cross .

B.Test cross - A cross is made between F1 hybrid and recessive parent is called Test cross. It is used to determine the F1 hybrid is heterozygous and homozygous. In the next generation 50% progeny are heterozygous dominant and 50% progeny are homozygous recessive plants are formed in 1:1 ratio.

C.Reciprocal cross - A cross, with the phenotype of each sex reversed as compared with the original cross, to test the role of parental sex on inheritance pattern is called Reciprocal crosses.

D.Hybrid cross – Crossing of two F1 hybrids with one another is called Hybrid cross.

So, the correct option is ‘Test cross’.