Question

Mating of an organism to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is called

• A. reciprocal cross
• B. test cross
• C. dihybrid cross
• D. back cross

Answer 1

Answer: (B)

Test cross is the cross of the individuals with its homozygous recessive parent. In other words we can say that, it is a specialized back cross of $F_1$ hybrid with its homozygous recessive parent in order to determine whether it is homozygous or heterozygous for a character. Reciprocal cross, is the cross that could be made either way or independent of the sex of the parents. Dihybrid cross is considering two pairs of contrasting characters. Back cross is the cross of the hybrids of F1 generations with either of its parents.