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How does population size affect the likelihood of changes in allele frequencies by chance alone?
Wiki User
∙ 16y ago
Mutation rates are small but constant. With a typical mutation rate of 1 x 10-6, it is expected that 1 out of a million individuals in a population will carry the mutation. If the population size is small (10,000 or fewer individuals), the probability that the mutation will be present is small (~1% with 104 individuals). If population sizes are large (107 or more individuals), the probability that the mutation will be present is large (~10 mutants expected if 107 individuals are in the population). Mutations can be lost from populations through genetic drift, and large populations experience less genetic drift than small populations. Thus mutations are more likely to exist and persist in large populations than in small populations.
Wiki User
∙ 16y ago
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Changes in ecosystems can affect the ability of an area to?
human population
How would selection against heterozygous individuals over many generations affect the frequencies of homozygous individuals?
If heterozygous individuals are not favored, then the frequency of heterozygous individuals will decrease as the frequency of homozygous individuals increase. This can be shown using the Hardy-Weinberg equation for allele frequencies in a population: p2 + 2pq + q2 = 1 where q2 & p2 are the frequencies of the two different homozygous individuals (eg. aa and AA) and 2pq is heterzygous (eg. Aa). As the equation shows, if 2pq decreases, the other two variables must increase to compensate.
How does the number of offspring affect the process of evolution?
Evolution is the change in allelic constitution of a population gene pool over time. As organisms reproduce, some variants reproduce less, others more, causing some alleles to increase their frequency in the gene pool, while other allele frequencies decline. It is the differential reproductive success of variants in the population that drives this change.
How does adaptation affect the evolution of a species?
It is, in fact, evolution (shifts in the frequencies of traits in populations) that causes adaptation (when these shifts lead to increased fitness).
How does carrying capacity affect k-strategist?
The carrying capacity affects k-strategists because their population reaches equilibrium at the carrying capacity and they experience a carrying capacity that changes little from year to year.
What does not change in a population unless outside factores affect the gene pool?
allelie frequencies
How will this most likely affect the population of hummingbirds that move through the area?
The likelihood of the population's survival will be enhanced. studyisland question.
The likelihood that a society will undergo political changes that negatively affect local business activity is called?
Political risk
How does fertility affect population changes?
inda ko
The hardy-weinberg states that in a population do not change unless outside factors affect the gene pool?
allele frequencies
How might one change in one population affect other population in a community?
It would change because when a population changes, a community changes too.
Changes in ecosystems can affect the ability of an area to?
human population
How can population changes affect demand for certain goods?
immediate demand for a good will go up if it's price is expected to rise. this is how population changes affect demand for certain goods.
The Hardy-Weinberg principle states that in a population do not change unless outside factors affect the gene pool.?
allele frequencies
The Hardy-Weinberg principle states that in a population do not change unless outside factors affect the gene pool?
allele frequencies
How might change in one population affect other populations in a community?
It would change because when a population changes, a community changes too.
How might a change in one population affect other populations in community?
It would change because when a population changes, a community changes too.
