QQuestionBiology
QuestionBiology
Imagine a population evolving by genetic drift, in which the frequency of the allele K is 0.8. What is the probability that at some point in the future allele K will drift to a frequency of 1.0? Express your answer as a number between 0 and 1.
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Answer
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Step 1:I'll solve this population genetics problem step by step using the fixation probability formula.
Step 2:: Understand the Concept of Fixation
In population genetics, fixation occurs when an allele reaches a frequency of 1.0 (100%) in a population. The probability of fixation depends on the current allele frequency.
Step 3:: Identify the Initial Allele Frequency
- Initial frequency of allele K = $$p = 0.8
- Complementary allele frequency = 1 - p = 0.2
Step 4:: Apply the Fixation Probability Formula
P(\text{fixation}) = p
Step 5:: Calculate the Fixation Probability
P(\text{fixation}) = 0.8
Final Answer
Key Insights: - This result comes from the neutral theory of genetic drift - The probability of fixation is directly proportional to the current allele frequency - In this case, allele K has a high probability (80%) of eventually reaching fixation
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