Question

The S-s antigen system in humans is controlled by twoco-dominant alleles, S and s.
In a group of 3146 individuals the following genotypic frequencieswere found: 188 SS,
717 Ss, 2241 ss.
A) Calculate the frequency of the S and s alleles.
B) Test whether the genotypic frequencies conform to theHardy-Weinberg
distribution using the Chi-square test.
C) A third allele is sometimes found at the S locus. The allele suis recessive to
both the S and s alleles, and can only be detected in thehomozygous state. If the
frequencies of the alleles S, s, and su are p, q, and rrespectively, what would be the
expected frequencies of the phenotypes S_, Ss, s_, susu? **Youranswers will be
equations written in terms of p, q and r.