EVOLUTION
SOURCES OF VARIATION IN A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Any change in the allelic frequencies in a population that is due to chance
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A small sample of a population settles in a location separated from the rest of the population
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The process in which humans select for or against particular features in organisms
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Members of one sex choose mates with particular features
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Detailed explanation-1: -The founder effect is a phenomena that occurs when a small group of individuals becomes isolated from a larger population. Regardless of what the original population looked like, the new population will resemble only the individuals that founded the smaller, distinct population.
Detailed explanation-2: -A founder effect, as related to genetics, refers to the reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population.
Detailed explanation-3: -In humans, founder effects can arise from cultural isolation, and inevitably, endogamy. For example, the Amish populations in the United States exhibit founder effects because they have grown from a very few founders, have not recruited newcomers, and tend to marry within the community.
Detailed explanation-4: -In humans the founder effect is defined as a decrease of genetic variation in the population due to a population bottleneck followed by random genetic drift.
Detailed explanation-5: -The new population is genetically different from the parent populations. For example: Pitcairn island is a group of volcanic islands. The calamities result in the development of the different human population on this island. This is an example of Founder’s effect.