Select the odd statement w.r.t. polygenic inheritance.

Easy

A

The phenotype reflects the contribution of each allele, i.e., the effect of each allele is additive.
B

Besides involvement of multiple genes it also takes into account the influence of environment.
C

Polygenic traits show distinct alternate forms in their occurrence and they are not spread across a gradient.
D

Human skin colour is a classic example of polygenic inheritance.

Solution

Polygenic traits are not so distinct in their occurrence and are spread across a gradient. For example, in humans we don’t just have tall or short people as two distinct alternatives but a whole range of possible heights. Such traits are generally controlled by three or more genes and are thus called as polygenic traits.

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