Concept explainers
The accompanying pedigree shows a family in which one child (II-1) has an autosomal recessive condition. On the basis of this fact alone, provide the following information.
a. Using A for the dominant allele and a for the recessive allele, give the genotypes for I-1, I-2, and II-1.
b. Using the same alleles, give the possible genotypes for II-2, II-3, and II-4.
c. What are the probabilities for each of the possible genotypes for II-2, II-3, and II-4?
d. What is the probability that all three of the children in generation II who have the dominant
e. What is the chance that among the three children in generation II who have the dominant phenotype, one of them is AA and two of them are Aa? (Hint: Consider all possible orders of genotypes.)
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Chapter 2 Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
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- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning