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What is the evidence that the differences in skin color in populations around the world evolved by natural selection?
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- What are the two selective pressures that lead to the pattern of skin color variation seen in populations around the world and how is they related to an increased level of fitness?How is the diversity in human skin color related to human environmental adaptation?So if skin color selection is not related to cancer, what accounts for the difference in skin color of different human populations? Meaning where is the selective pressure coming from to explain the differences in skin color?
- Why is reduced pigmentation of the skin advantageous for individuals from northern latitudes? What role does darker pigmentation serve for individuals near the equator? What is the relationship between skin pigmentation and fitness?Natural Selection Affects the Frequency of Genetic Disorders Will a recessive allele that is lethal in the homozygous condition ever be completely removed from a large population by natural selection?Based on everything that you have learned so far, provide an explanation for how the different shades of skin color from pinkish white to dark brown evolved throughout human history.
- Why do traits have to be heritable in order for evolution by natural selection to occur?Is “Race” a valid biological way to categorize modern humans? Why or why not? How many biological races of humans are there in the world today? Populations of people in any given world region often share more phenotypic characteristics with each other than they do with people in populations in other world regions. Explain how evolutionary forces contributed to this phenomenon.Will a recessive allele that is lethal in the homozygous condition ever be completely removed from a larger population by natural selection?
- Why might some light-skinned populations, such as the Japanese, be missing the F374 allele for lighter skin pigmentation? (Hint: Consider the various forces of evolution that may be at play.)Why is it that the evolution of skin color is considered a case of natural selection? Group of answer choices A- Because different alleles in skin color genes lead to differences in skin color B- Because differences in skin color lead to differences in number of children in different environments C- Both D- NeitherWhich of the following decreases the evolutionary fitness in people with darker skin color? Assume there is no dietary supplementation. A_ Low folate in areas with high UV B_ Low folate in areas with low UV C_Low vitamin D in areas with high UV D_Low vitamin D in areas with low UV