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Question
Biology
Posted 6 months ago
Contrast genetic drift to gene flow and describe how genetic drift can occur by choice?
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Answer from Sia
Posted 6 months ago
Answer
Genetic drift is a random process that leads to changes in allele frequencies within a population, while gene flow involves the transfer of alleles between populations. Genetic drift can occur by chance events, not by choice.
Solution
a
Contrast between genetic drift and gene flow: :
Genetic drift is a stochastic process that affects allele frequencies in a small population due to random sampling of organisms. Gene flow, on the other hand, is the movement of alleles between populations due to migration of individuals or gametes.
b
Mechanisms of genetic drift: :
Genetic drift can occur through events like the bottleneck effect, where a large population is drastically reduced in size by a random event, or the founder effect, where a new population is started by a small number of individuals from a larger population. These events lead to a reduction in genetic variation and can cause allele frequencies to change at random, not by choice.
Key Concept
Genetic drift versus gene flow
Explanation
Genetic drift is a random process that changes allele frequencies within a population, often having a more significant effect in small populations. Gene flow is the exchange of genes between populations and tends to counteract the effects of genetic drift by introducing new alleles.

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