Question

Which among the following statements is/are correct with respect to the law of dominance?

• A. A & B only
• B. C& D only
• C. C &A only
• D. A, B, C & D

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A

A & B only

B

C& D only

C

C &A only

D

A, B, C & D

Law of dominance explains that out of the two factors determining a character, one is dominant- this is the one that gets expressed in heterozygous condition. Thus the dominant character appears in $F_1$ generation when the progenies are heterozygous. The law of dominance also explains the reappearance of the recessive factor in the $F_2$ generation, when the recessive factors re-unite in a homozygous condition. Thus, it also explains the proportion of 3:1 obtained in the $F_2$ generation.