Human Skin and Eye Color Are Traits That Are

question 123

Multiple Choice

Human skin and eye color are traits that are

• A) the result of polygenic inheritance.
• B) examples of continuous variation.
• C) incompletely penetrant.
• D) the result of polygenic inheritance and examples of continuous variation.
• E) the result of polygenic inheritance, examples of continuous variation, and incompletely penetrant.

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Definitions:

Testosterone

A steroid hormone that plays a key role in the development of male reproductive tissues, as well as promoting secondary sexual characteristics.

Pigmented Hairs

Pigmented hairs are hairs that contain melanin, which gives hair its color, varying from person to person and changing with age.

Terminal Hairs

The thick, pigmented hairs that replace vellus hairs in certain body parts during puberty.

Lanugo

Fine, soft hair that covers the body of a fetus, serving as insulation before the development of fat layers.