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Answer :
The correct option is b.
The frequency of black noses in wolves is likely to remain consistent over generations as there is no selective advantage for nose color, and natural selection is not influencing allele frequencies.
Other factors like genetic drift and mutation could influence changes, but if no such factors exist, the dominant black nose allele will maintain its frequency.
The question pertains to the change in frequency of alleles coding for nose color in wolves over many generations. Since there is no selective advantage for either black or brown noses, natural selection is not affecting the frequency of these alleles.
Therefore, the most likely outcome is that the frequency of black noses, which is the dominant trait, will stay about the same as it is now, unless other factors such as genetic drift or mutation come into play.
However, genetic drift can cause random fluctuations in allele frequencies, which are more pronounced in small populations. Likewise, new mutations could potentially alter the current allele frequencies.
Thus, the correct answer to the question would be B. Black noses will stay about the same frequency as now.
The complete question is here:
The allele for black noses in wolves is dominant over the allele for brown noses. There is no known selective advantage for one nose color over another in wolves. If this remains true, which of the following statements is most likely TRUE about the change in wolf nose colors over many generations?
A. Black noses will become more common than they are now.
B. Black noses will stay about the same frequency as now.
C. Black noses will become less common than they are now.
D. Brown noses will disappear after enough generations pass.
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Final answer:
If there's no selective advantage for one nose color over another in wolves, and other forces don't interfere, the frequencies of the alleles for black and brown noses should remain stable over many generations according to Hardy-Weinberg equilibrium.
Explanation:
In the case of wolf nose colors, we're dealing with Mendelian genetics, where one allele, the one for black noses, is dominant over the other, which is for brown noses. If there is no known selective advantage or disadvantage for one nose color over another, this implies that natural selection isn't influencing the frequency of these alleles in the population. This would mean that theoretically, the frequency of these alleles in the population should follow the principles of Hardy-Weinberg equilibrium. This predicts that frequencies of alleles in a population will remain stable from generation to generation unless forces such as mutation, migration, non-random mating, genetic drift, or natural selection influence them. In this case, if these forces aren't influencing the wolf nose colors, we would expect a stable frequency of the allele for black and brown noses over many generations.
Learn more about Mendelian genetics here:
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