- A boat carrying 2,000 passengers sets sail for an island with apopulation of 23,000. Both of these populations consist of an equalnumber of males and females.
21 male passengers on the ship have an X-linked recessivecondition. 15 of the male island inhabitants have the samecondition, and no females on the ship or the island show thephenotype.
- What is the frequency of the disease-causing allele on theship?
- How many females on the ship would you expect to be carriersfor this condition?
- The ship docks, and a woman from the island falls pregnant toan unaffected man from the ship. What are the chances their firstson will be affected with the condition?
- An affected man from the island and a woman from the ship havea girl. What is the daughter’s chance of being a carrier?
