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Question

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


A

A & B only

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B

C& D only

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C

C &A only

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D

A, B, C & D

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Solution

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 F1 generation when the progenies are heterozygous. The law of dominance also explains the reappearance of the recessive factor in the F2 generation, when the recessive factors re-unite in a homozygous condition. Thus, it also explains the proportion of 3:1 obtained in the F2 generation.


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