Question

A population of cats has the following genotypes for an X-linked coat-color trait (O for the dominant brown allele, o for the recessive orange allele): Brown homozygous females: 30 Brown heterozygous females: 75 Orange females: 10 Brown males: 50 Orange males: 65 What are the allele frequencies in this population

Answer 1

Allele frequency for brown fur color
`0.43`

Allele frequency for orange fur color
`0.570`

Step-by-step explanation:

Given

"O" denotes dominant brown allele

and "o" denotes recessive orange allelehe

The trait "coat color" is linked with X gene

Brown homozygous females: 30

Brown heterozygous females: 75

Orange females: 10

Brown males: 50

Orange males: 65

Allele frequency for orange color

`(10+65)/(30+75+10+50+65) \\= (75)/(230) \\= 0.3260\\`

Thus
`q = √(0.3260) \\q = 0.570\\`

Allele frequency for orange fur color
`0.570`

Allele frequency for brown color

`p = 1-q\\= 1- 0.570\\= 0.43`

Allele frequency for brown fur color
`0.43`