OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The allele will increase in the population since it is beneficial
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The allele will decrease in the population since it is beneficial
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The allele will decrease in the population since it is not beneficial
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The allele will increase in the population since it is not beneficial
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Detailed explanation-1: -Why do dark-colored rock pocket mice on dark lava flows have white bellies? There is no selection for dark bellies by visual predators. There is a reproductive advantage to having a dark belly. White bellies are an important part of camouflage.
Detailed explanation-2: -The dark coloration in the rock pocket mouse did not arise because there was a lava flow. Rather, a random mutation proved adaptive to the mice living in areas of dark-colored volcanic rock.
Detailed explanation-3: -(1) Biologists explain how the mice on the lava flow evolved black fur through evolution by natural selection. The elements that helped this process were variation, inheritance, differences in survival/reproduction, and adaptation.
Detailed explanation-4: -Inheritance • New mutations cause black color (time mark 3:24). Fur color is controlled by many genes (4:29). Most genes are identical, but dark and light rock pocket mice differ in one gene (Mc1r; 4:55). Data from Data Set 2 show that a mouse’s genotype for the MC1R gene affects their fur color.