The trait for 'male-pattern baldness' is a recessive trait encoded for by "b". Non-balding is encoded for by a dominant allele encoded for by the letter "B". A street survey conducted by Hair Club for Men found that out of 1000 men, 360 had male pattern baldness, the other 480 who did not and were heterozygous, and 160 who did not and were homozygous for a full head of hair.
1) What are the phenotype ratios?
2) Using this information find the allele frequencies for "B" and "b."
3) What are the expected genotype frequencies ?
The observed phenotypes for the MN blood group
of an island population of 1,000 individuals are as follows:
MM MN NN
200 200 600
4) What are the phenotype frequencies for this population?
5)What are the allele frequencies in this population?
6) What are the expected genotype frequencies
for this population?
7) Is the population in Hardy-Weinberg equilibrium?
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This page was created by Richard Sutter.
Last updated 6/30/03.