Q.

The gene which exhibites multiple effects is known as –

A. Pseudogene
B. Pleiotropic
C. Complementary
D. Polygene
Answer» B. Pleiotropic
Explanation: Pleiotropy describes the genetic effect of a single gene on multiple phenotypic traits. The underlying mechanism is that the gene codes for a product that is, for example, used by various cells, or has a signaling function on various targets. A classic example of pleiotropy is phenylketonuria, a human disease that affects multiple systems but is caused by one gene defect.
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