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Practice problem

What Is Evolution? — Definition & Overview

By Valeri Natole
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Contributors
Four circles before and after a period of time. Before, from smallest to largest, were orange, red, yellow. then blue. After, from smallest to largest, is red, and the other three are the same size.

Each of the four circles - red, blue, yellow, and orange - represents the frequency of a gene. If a circle gets bigger, the gene it represents has become more frequent in the population. If a circle gets smaller, the gene it represents has become less frequent in the population.

Which of these statements is true?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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