EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Genotypic variation will increase in the population.
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Genotypic variation will decrease in the population.
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The occurrence of a preexisting gene will increase in the population.
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The occurrence of a preexisting gene will decrease in the population.
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Detailed explanation-1: -The majority of mutations are neutral in their effects on the organisms in which they occur. Beneficial mutations may become more common through natural selection. Harmful mutations may cause genetic disorders or cancer.
Detailed explanation-2: -Answer and Explanation: The correct answer to this question is B. They always cause a change to an organism’s genotype. Regardless of the cause of the change, a DNA sequence is always altered when it mutates.
Detailed explanation-3: -Harmful mutations may cause genetic disorders or cancer. Beneficial mutations are essential for evolution to occur. They increase an organism’s changes of surviving or reproducing, so they are likely to become more common over time. A genetic disorder is a disease caused by a mutation in one or a few genes.
Detailed explanation-4: -Mutation creates slightly different versions of the same genes, called alleles. These small differences in DNA sequence make every individual unique. They account for the variation we see in human hair color, skin color, height, shape, behavior, and susceptibility to disease.