Human eye colors are found on a spectrum that ranges from completely pigmented (dark brown eyes) to a complete lack of pigment (light blue eyes).
Which type of non-Mendelian inheritance does human eye color exemplify and why?

A. polygenic inheritance
B. Codominance
C. incomplete dominance
D. sex-linked traits

A. polygenic inheritance

Explanation:

The type of non-Mendelian inheritance exemplified in human eye color is polygenic inheritance.  In polygenic inheritance, a single trait is determined by the additive effect of more than one gene. Several gene combine together to determine a trait. Such traits are not definite, they are usually within a range spectrum, examples are height, hair color and eye color.  Eye color is reported by researchers to be controlled by up to 10 genes

On the contrary monogenic inheritance are responsible for traits which are controlled by a single gene such as the ability to roll the tongue

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