The frequency of phenotypes for a typical polygenic trait is most often expanded as a bell-shaped curve.
What is a bell-shaped curve?
A bell-shaped curve is just called a bell curve. It is a mathematical function, These functions are typically constant or smooth, asymptotically approach zero for large negative or positive x, and have a single, unimodal maximal at small x.
A bell curve is a graph showing the normal arrangement, which has a shape mindful of a bell.
The part of the curve exhibits the mean, mode, and median of the data stored. Bell curves are used usually in statistics, considering in examining economic and financial data.
Therefore, option b is correct.
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