Wearing baseball caps in class is the symptom of a serious
mental disorder occurring in individuals homozygous for a recessive
A. If two normal parents had a daughter with symptoms of this
disorder and a normal son, what is the porbability that the son is
a carrier of the recessive allele? Explain.
B. If the normal son married a normal woman whose brother was
affected by this disorder and whose parents were not, what is the
probability that the first offspring of this marriage would be
affected? Show your calculations.
C. If the first child born to the couple in part B above were
affected, what is the probability that the next child also would be
D. If the first two children born to the couple in part B were
affected, what is the probability that the next child would be