Multiple choice

Which among the following does not characterise polygenic traits?

  1. These are controlled by more than a single pair of alleles.

  2. These are responsible for a number of traits in the phenotype.

  3. These are found in either men or women, but not in both.

  4. The phenotype of an individual depends on alleles in multiple genes.
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A Correct answer
Explanation

Polygenic traits are determined by multiple pairs of alleles. Simple Mendelian rules of dominance do not readily apply. Human stature is an example. It results from all of the genes that determine the size of all body parts from head to foot.

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