question archive In areas with primarily dark-colored substrate, dark-coat mice have a selective advantage over light-coat mice
In areas with primarily dark-colored substrate, dark-coat mice have a selective advantage over light-coat mice
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In areas with primarily dark-colored substrate, dark-coat mice have a selective advantage over light-coat mice. Therefore, mice with one or more copies of the dominant Mc1r D allele have a selective advantage over mice with two copies of the Mc1r d allele. Even small selective advantages can have a profound effect on allele frequencies in a population if given enough time.
15)In a population of 500 light-coat individuals (dd), an individual is born with a mutation (D) in one of their two copies of the Mc1r with the effect of producing a dark-coat phenotype. What is the initial frequency of the D in this population?
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Step-by-step explanation
To get the allele initial frequency of D in this population, follow this step:
-Use the equation:
Frequency=Number of copies of allele/Total number of gene copies in the population
-Identify the given:
Number of copies of allele D = 1
Total number of gene copies in the population = 500 (2) = 1,000
-Substitute the given:
Frequency=Number of copies of allele/Total number of gene copies in the population
Frequency= 1/1000
Frequency = 0.001 or 0.1 %
So the initial allele frequency of D in this population is equal to 0.001 or 0.1 %, which a very small value, obviously because only one copy of this allele appear in the population with 500 individuals. Thus, the frequency is very low.
