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Q.

A pleiotropic gene :

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a

Is a gene evolved during Pliocene

b

Controls multiple traits in an individual

c

Controls a trait only in combination with another gene

d

Is expressed only in primitive plants

answer is A.

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Detailed Solution

Generally one gene controls one phenotype but sometimes one gene may control more than one phenotype. The genes that control more than one phenotype are pleiotropic genes. A pleiotropic gene controls a major phenotypic trait and along with that it influences some other phenotypic traits also.

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