Question

try this!
in mice, black eye color (b) is dominant to blue eye color (b). use the diagram to answer these questions:

• in the gene pool, how many alleles are...

black? 20
blue? 30
total? 50

• what is the allele frequency for...

b? 20 / 50 = 0.4 = 40%
b? 30 / 50 = 0.6 = 60%

• what is the phenotypic frequency for...

black?
blue?
*note: black circles represent \b\ allele; gray circles represent \b\ allele
open-ended question
what percentage of the population is black?

Explanation:

Step1: Calculate the number of black - eyed mice

The number of heterozygous black - eyed mice is 12, and the number of homozygous black - eyed mice is 4.
The total number of black - eyed mice \(N_{black}=12 + 4=16\)
The total number of mice in the population \(N_{total}=12 + 4+9=25\)

Step2: Calculate the phenotypic frequency of black - eyed mice

The formula for phenotypic frequency \(f=\frac{N_{black}}{N_{total}}\)
Substitute \(N_{black} = 16\) and \(N_{total}=25\) into the formula: \(f=\frac{16}{25}\)
\(\frac{16}{25}=0.64 = 64\%\)

Answer:

64%