GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
A=0.42, a=0.12
|
|
|
A=0.6, a=0.4
|
|
|
A=0.65, a=0.35
|
|
|
A=0.76, a=0.24
|
Detailed explanation-1: -To find the allele frequencies, we again look at each individual’s genotype, count the number of copies of each allele, and divide by the total number of gene copies.
Detailed explanation-2: -An allele frequency is calculated by dividing the number of times the allele of interest is observed in a population by the total number of copies of all the alleles at that particular genetic locus in the population. Allele frequencies can be represented as a decimal, a percentage, or a fraction.
Detailed explanation-3: -The frequency of the “a” allele. Answer: The frequency of aa is 36%, which means that q2 = 0.36, by definition. If q2 = 0.36, then q = 0.6, again by definition. Since q equals the frequency of the a allele, then the frequency is 60%.
Detailed explanation-4: -The total number of alleles = the total number of individuals x2. In the small population, there are 2 BB genotypes and 2 Bb genotypes, so 2x2 + 2 = 6 B alleles. There are 5 individuals, so 2x5=10 alleles in total.