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AP® Biology

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Moderate

Island Population

APBIO-DGVFIZ

A continental population of insects has blue, red, green, and black variations. The color is controlled by the interaction of two genes, one with two alleles, the other with three alleles.

A piece of driftwood carrying two green insects and five red insects floats in the ocean for several days and washes up on a small island where the insect species did not previously live. The seven insects establish a new population on the island that increases in number significantly over several generations.

Which of the following statements correctly compares the island population with the original mainland population?

A

Red is dominantly inherited in the island population, while on the mainland green is dominant.

B

The island population has lower genetic diversity than the mainland population.

C

The island population is more likely to experience competition with other insect species than the mainland population.

D

The island population size is increasing, while the mainland population is decreasing.