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A population carries two alleles at a locus. One allele has a very small fitness advantage. What is the long-term fate of the locus if natural selection is the only affecting this population evolutionary force? The allele at a disadvantage will mutate to improve to the fitness level of the other allele. The population size will increase. Eventually the beneficial allele will be fixed by natural selection. Either allele may be eliminated randomly due to differences in their initial frequencies. O The population size will decrease. Both alleles will remain in the population at a ratio proportional to the fitness difference.

A population carries two alleles at a locus. One allele has a very small fitness advantage. What is the long-term fate of the locus if natural selection is the only affecting this population evolutionary force? The allele at a disadvantage will mutate to improve to the fitness level of the other allele. The population size will increase. Eventually the beneficial allele will be fixed by natural selection. Either allele may be eliminated randomly due to differences in their initial frequencies. O The population size will decrease. Both alleles will remain in the population at a ratio proportional to the fitness difference.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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A population carries two alleles at a locus. One allele has a very small fitness advantage. What is the long-term fate of the locus if natural selection is the only affecting this population evolutionary force? The allele at a disadvantage will mutate to improve to the fitness level of the other allele. O The population size will increase. Eventually the beneficial allele will be fixed by natural selection. O Either allele may be eliminated randomly due to differences in their initial frequencies. O The population size will decrease. O Both alleles will remain in the population at a ratio proportional to the fitness difference.
Transcribed Image Text:A population carries two alleles at a locus. One allele has a very small fitness advantage. What is the long-term fate of the locus if natural selection is the only affecting this population evolutionary force? The allele at a disadvantage will mutate to improve to the fitness level of the other allele. O The population size will increase. Eventually the beneficial allele will be fixed by natural selection. O Either allele may be eliminated randomly due to differences in their initial frequencies. O The population size will decrease. O Both alleles will remain in the population at a ratio proportional to the fitness difference.
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