Percent of Organisms with Trait

Which statement best explains what occurred after 10 years?

A. Inheritance of the trait slowed as the population of shrews decreased.
B. A mutation in the shrew population made the trait more common.
C. An environmental change favored the trait for selection within the population.
D. The shrew population began breeding with another shrew population.

Occurrence of Trait in Shrew Population

Time (years)
0 5 10 15 20 25

100
75
50
25
0

Question

24-07-2024
Biology

Answered

Percent of Organisms with Trait

Which statement best explains what occurred after 10 years?

A. Inheritance of the trait slowed as the population of shrews decreased.
B. A mutation in the shrew population made the trait more common.
C. An environmental change favored the trait for selection within the population.
D. The shrew population began breeding with another shrew population.

Occurrence of Trait in Shrew Population

Time (years)
0 5 10 15 20 25

100
75
50
25
0

Answer :

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GinnyAnswer GinnyAnswer · Answer 1 · 2024-07-24T12:43:57-04:00

Final answer:

An environmental change favored the trait for selection leading to a shift in genetic variance, genetic drift can occur more quickly on islands, and natural selection drives the prevalence of advantageous traits.

Explanation:

An environmental change favored the trait for selection within the population. When the environment changes, populations may undergo directional selection, selecting for specific phenotypes. This can lead to a shift in the population's genetic variance toward the new, fit phenotype, as seen in the evolution of the peppered moth during the Industrial Revolution.

Genetic drift in a population can lead to the loss of alleles by chance. This process can happen more quickly on islands due to smaller population sizes and reduced genetic diversity.

Natural selection acts based on the genetic makeup of organisms, where traits that offer reproductive advantages become prevalent in populations over generations.

Learn more about Evolution and Natural Selection here:

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