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QuestionBiology
Question: the allele for black noses in wolves is dominant over the allele fro the brown noses. There is no known selective advantage for one nose colour over another in wolves. If this remains true, which of the following statements is most liklely TRUE about the change in wolf nose colours re over many generations?Black noses will become more common than they are
the allele for black noses in wolves is dominant over the allele fro the brown noses. There is no known selective advantage for one nose colour over another in wolves. If this remains true, which of the following statements is most liklely TRUE about the change in wolf nose colours re over many generations?
Black noses will become more common than they are now
black noses will stay about the same frequency as now
black noses will become less common than they are now
brown noses wil disappear after enough generations pass
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Answer
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Step 1:Let's solve this population genetics problem step by step:
Step 2:: Understand the Genetic Inheritance
- The allele for black noses is dominant over the brown nose allele - There is no selective advantage for either nose color
Step 3:: Analyze Genetic Inheritance Patterns
- In a dominant-recessive inheritance pattern with no selective advantage, the allele frequencies will remain stable over generations - This is described by the Hardy-Weinberg equilibrium principle
Step 4:: Evaluate Possible Outcomes
\bullet$$ The genetic composition will remain relatively constant
- Since there's no selective pressure:
Step 5:: Determine Most Likely Scenario
- The most likely outcome is that black and brown nose frequencies will remain approximately the same over many generations
Final Answer
Explanation: When there is no selective advantage for a particular trait, genetic drift and mutation rates are typically too small to cause significant changes in allele frequencies over generations. The Hardy-Weinberg principle predicts genetic equilibrium under these conditions.
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