Question

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, B and b: BB = 30, Bb = 10, and bb = 10. Calculate the frequencies of the two alleles in the population’s gene pool.

Answer 1

Answer:

the frequency of allele B is 0.7 and allele b is 0.3 in population’s gene pool.

Step-by-step explanation:

Allele frequency is how often an allele occurs in a gene pool relative to the other alleles for that gene

Genotype     No. of Individuals     No. of Allele B   No. of Allele b                       

BB                    30                            30*2 =60                   30*0 =0

Bb                     10                            10*1 =10                       10*1=10

bb                     10                             10 *0 =0                      10*2=20

Total                 50                              70                                 30

Total no. of alleles = 70+30 =100

The frequency of allele B :$\frac{\text{number of B alleles}}{\text{total number of alleles}}$

:$\frac{70}{100}$

:$0.7$

The frequency of allele b :$\frac{\text{number of b alleles}}{\text{total number of alleles}}$

:$\frac{30}{100}$

:$0.3$

Hence the frequency of allele B is 0.7 and allele b is 0.3 in population’s gene pool.