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Population bottlenecks occur when the size of a population is drastically reduced, either through extinction or because of separation.
When this occurs, it is reasonable to assume that the genetic cross-section of the remaining population is not identical to that of the original population. Not all individuals carry every allele present in the original population, so the remaining population will carry only a small portion of the original number of alleles.
This can cause what is known as the 'founder effect'.
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∙ 10y ago
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∙ 12y agoIt greatly reduces the total population. This increases the effects of genetic drift on allele frequency.
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∙ 11y agoIt increases the frequency of alleles that improve a species' survival in a particular environment.
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∙ 12y agoIt causes the allele frequency to resemble that of the members of the population who first became separated from the rest of the species. (Study Island)
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∙ 14y agoA genetic drift is likely to occur
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∙ 13y agoKyo Kusanagi
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Which is an example of genetic drift?
Allele frequencies change randomly each generation. APEX
A flood kills most of the ants that live near a river. After the flood one population of ants grows rapidly but its allele frequencies are different from the frequencies before the flood. What does th?
Bottleneck
What is genic drift?
Genetic drift is change in allele frequencies due to random chance events. Two types are the Founder effect and the Bottleneck effect. The founder effect is when a subset of a population goes to a new are where there are no other of that same species. The bottleneck effect is when a large population is reduced to a small population. Genetic drift decreases variation in a population and has a greater effect on a smaller population than a larger one.
The number of trout in a lake drops when the lake is polluted. The trout population increases but the allele frequency is different than it was before the pollution. What type of effect is this?
Apex . . bottleneck
A flood kills most of a population of ants that lives near a river. After the flood the ant population increases but its allele frequencies are different. What does this situation represent?
bottleneck (apex) [correct]
Which is an example of genetic drift?
Allele frequencies change randomly each generation. APEX
What effect does a bottleneck have on the allele frequency of a population?
A bottleneck can lead to a significant reduction in the genetic diversity of a population, causing certain alleles to be lost and others to become more common. This can increase the frequency of rare alleles and result in genetic drift, potentially leading to an increase in genetic diseases or reduced fitness in the population.
A flood kills most of the ants that live near a river. After the flood one population of ants grows rapidly but its allele frequencies are different from the frequencies before the flood. What does th?
Bottleneck
What is genic drift?
Genetic drift is change in allele frequencies due to random chance events. Two types are the Founder effect and the Bottleneck effect. The founder effect is when a subset of a population goes to a new are where there are no other of that same species. The bottleneck effect is when a large population is reduced to a small population. Genetic drift decreases variation in a population and has a greater effect on a smaller population than a larger one.
The number of trout in a lake drops when the lake is polluted. The trout population increases but the allele frequency is different than it was before the pollution. What type of effect is this?
Apex . . bottleneck
A flood kills most of a population of ants that lives near a river. After the flood the ant population increases but its allele frequencies are different. What does this situation represent?
bottleneck (apex) [correct]
The number of trout in a lake drops when the lake is polluted. The trout population later increases but the allele frequencies are different. What does this situation represent?
Answer this question… Genetic drift
A situation in which allele frequencies change as a result of the migration of a small subgroup of a population is know as the?
founder effect
What is the type of equilibrium that occurs when allele frequencies do not change?
Genetic equilibrium is when the allele frequencies remain constant.
A genetic change which can effect a species fitness?
evolution within a species. the allele frequencies in a gene pool of a population
What does it mean for a population to be in genetic equilibrium?
It is a situation where allele frequencies remain constant.
A population in which allele frequencies do not change from generation to generation is said to be in?
A population in which the allele frequencies do not change from one generation to the next is said to be in equilibrium.
