Question

Write a note on pleotropism.

Answer 1

Pleiotropism is a central term in developmental genetics. In pleiotropism, a single gene affects a number of phenotypic traits in the same organism.

These pleiotropic effects often seem to be unrelated to each other. The usual underlying mechanism is that the same gene is activated in several different tissues, producing apparently different effects. It follows that the phenomenon must be extremely common, since most genes will have effects in more than one tissue.

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