In a Very Large Population, a Quantitative Trait Has the Following

question 43

Multiple Choice

In a very large population, a quantitative trait has the following distribution pattern. If there is no gene flow, the curve shifts to the left or to the right, and the population size consequently increases over successive generations, which of the following is most likely occurring?

• A) immigration or emigration
• B) directional selection
• C) disruptive selection
• D) genetic drift

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Definitions:

Sternomastoid

A major muscle in the neck that extends from the sternum and clavicle to the mastoid process of the temporal bone, involved in head rotation and flexion.

Mylohyoid

A muscle in the floor of the mouth that elevates the hyoid bone and the floor of the mouth during swallowing and speaking.

Serratus Ventralis

A muscle group found in the thorax that plays a crucial role in the movement of the scapula.

Redundancies

Situations or elements that are unnecessary or duplicative, often leading to inefficiency.