Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 4, Problem 30PDQ
Consider the three pedigrees below, all involving a single human trait.
- (a) Which combination of conditions, if any, can be excluded?
dominant and X-linked
dominant and autosomal
recessive and X-linked
recessive and autosomal
- (b) For each combination that you excluded, indicate the single individual in generation II (e.g., II-1, II-2) that was most instrumental in your decision to exclude it. If none were excluded, answer “none apply.”
- (c) Given your conclusions in part (a), indicate the genotype of the following individuals:
II-1, II-6, II-9
If more than one possibility applies, list all possibilities. Use the symbols A and a for the genotypes.
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Students have asked these similar questions
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.
1) What is the chance that among the three children in generation II who have the dominant phenotype, one of them is AAAA and two of them are AaAa? (Hint: Consider all possible orders of genotypes.)
Express your answer to two decimal places.
In the following pedigree, is the disorder’s mode of inheritanceautosomal dominant, autosomal recessive, or X-linked recessive?Explain your reasoning.
Consider the two very limited unrelated pedigrees shown here. Of the four combinations
of X-linked recessive, Xlinked dominant, autosomal recessive, and autosomal dominant,
which modes of inheritance can be ruled out in each case?
(a)
(b)
II
1
Chapter 4 Solutions
Concepts of Genetics (12th Edition)
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