A Mutation Arises in a Population of Humans That Allows

question 21

Multiple Choice

A mutation arises in a population of humans that allows them to digest milk from domesticated cattle.The trait is favorable and increases in frequency over time.This is an example of

• A) positive selection.
• B) negative selection.
• C) stabilizing selection.
• D) neutral selection.
• E) disruptive selection.

---

Definitions:

Serotonin

A neurotransmitter involved in the regulation of mood, sleep, appetite, and pain perception, among other physiological processes.

PYY

A hormone concerned with hunger and the lack of hunger, part of the neuroendocrine system that influences appetite and food intake.

Serotonin

A neurotransmitter in the brain that affects mood, emotion, and sleep.

High Carbohydrates

Diets or food items that have a large proportion of carbohydrates, which are essential energy sources but, when consumed in excess, can contribute to weight gain and other health issues.