QUESTION 7 2 poin In a study described in the HIV clock lab a researcher (Korber

Question

QUESTION 7 2 poin In a study described in the HIV clock lab a researcher (Korber) was able to estimate the approximate date that HIV jumped from chimps to humans. This estimate relied on what property of sections of DNA that are not under selection? a. Stretches of DNA that are not under selection exhibit clock-like behavior, changing at a relatively constant rate. Stretches of DNA that are not under selection exhibit clock-like behavior, changing at a constantly changing rate C Stretches of DNA that are not under selection do not exhibit predictable patterns of behavior, making the estimate erroneous

Explanation / Answer

7. According to molecular clock hypothesis, evolution of genes or proteins occurs at a constant rate. Korber assumed a constant evolution rate to estimate the approximate date that HIV jumped from chimps to humans. So, the correct option is option A, Stretches of DNA that are not under selection exhibit clock-like behavior, changing at a relatively constant rate.

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