Which of the Following Calculations Require the Use of the Addition

question 62

Multiple Choice

Which of the following calculations require the use of the addition rule of probability?

• A) Calculate the probability of black offspring from the cross AaBb × AaBb, where B is the symbol for black.
• B) Calculate the probability of children with both cystic fibrosis and polydactyly when parents are each heterozygous for both genes.
• C) Calculate the probability of each of four children having cystic fibrosis if the parents are both heterozygous.
• D) Calculate the probability of a child having either sickle-cell anemia or cystic fibrosis if parents are each heterozygous for both.