Information: In sock monkeys, lip size is a sex-linked trait where big lips (X B
ID: 178439 • Letter: I
Question
Information: In sock monkeys, lip size is a sex-linked trait where big lips (XB) > small lips (XS) > tiny lips (XT). In the far-off land of your little sister’s bedroom, you find a gaggle of sock monkeys and decide to study them.
Information: If this population has the distribution of females below:
Questions:
a) What are the allelic frequencies for all three alleles? Please show work.
b) What are the expected genotypic proportions of males in the population? please show work.
c) What are the expected proportions and numbers of females per genotype in the population? please show work.
d) Is this population in hardy weinberg equilibrium for this trait? Why or why not?
XBXB XBXT XBXS XSXS SYT YTYT 12 15 16 9 12 6Explanation / Answer
Given: Total genotypes of females = 70
a. Allelic frequency of XB
(2*12) + 15+16 / 2*70 = 0.39
Allelic frequency of XT
(2*6) +12+15 / 2*70 = 0.28
Allelic frequency of XS = (2*9) + 12 +16/ 2*70 = 0.33
b. zero
The entire population is female. There are no males.
c. Females per genotype in this population is already given.
d. Yes, the population is in Hardy-Weinberg's equilibrium.
This is so because (0.39+0.28+0.33)^2 = 1