Suppose That Mice and Humans Differ by 20 Substitutions in Their

question 121

Multiple Choice

Suppose that mice and humans differ by 20 substitutions in their globin genes, and rats and mice differ by 5 substitutions.On the basis of other evidence, we know that the ancestor to humans and mice lived 80 million years ago.Assuming the molecular clock is operating, rats and mice split from each other _______ million years ago.

• A) 5
• B) 10
• C) 20
• D) 40
• E) 80

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Definitions:

Dominant Mood

The prevailing emotional state or overall feeling that characteristically influences an individual's attitude and behavior.

Responses to the Environment

The various ways organisms adapt, react, or change due to stimuli or changes in their external surroundings.

Temperament

Innate characteristics of an individual's personality, including tendencies towards emotional reactivity, intensity, and behavioral patterns.

Temperamental Qualities

Innate traits that determine an individual's predisposition to behave and react in certain ways.