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A pleiotropic gene:

1. is a gene evolved during Pliocene.
2. controls a trait only in combination with another gene
3. controls multiple traits in an individual.
4. is expressed only in primitive plants

Correct answer: controls multiple traits in an individual.

Solution

A pleiotropic gene has pleiotropy, meaning one gene influences multiple traits in the same organism. This is different from genes that only act together or are limited to certain groups of organisms.

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