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I-1 I-2 П-1 П-2 П-3 П-4 II-5 П-6 П-7 III-1 Ш-1 III-2 III-3 Ш-3 III-4 FIGURE 25.3 A family pedigree of Huntington disease, indicating dominant inheritance. Because the dominant allele is rare, most affected individuals are heterozygotes. Rare cases of people who are homozy- gous for the disease-causing allele have been reported. Such individuals INTERACTIVE EXERCISE tend to have more severe symptoms.

I-1 I-2 П-1 П-2 П-3 П-4 II-5 П-6 П-7 III-1 Ш-1 III-2 III-3 Ш-3 III-4 FIGURE 25.3 A family pedigree of Huntington disease, indicating dominant inheritance. Because the dominant allele is rare, most affected individuals are heterozygotes. Rare cases of people who are homozy- gous for the disease-causing allele have been reported. Such individuals INTERACTIVE EXERCISE tend to have more severe symptoms.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What feature(s) of this pedigree indicate(s) dominant inheritance?

I-1 I-2 П-1 П-2 П-3 П-4 II-5 П-6 П-7 III-1 Ш-1 III-2 III-3 Ш-3 III-4 FIGURE 25.3 A family pedigree of Huntington disease, indicating dominant inheritance. Because the dominant allele is rare, most affected individuals are heterozygotes. Rare cases of people who are homozy- gous for the disease-causing allele have been reported. Such individuals INTERACTIVE EXERCISE tend to have more severe symptoms.
Transcribed Image Text:I-1 I-2 П-1 П-2 П-3 П-4 II-5 П-6 П-7 III-1 Ш-1 III-2 III-3 Ш-3 III-4 FIGURE 25.3 A family pedigree of Huntington disease, indicating dominant inheritance. Because the dominant allele is rare, most affected individuals are heterozygotes. Rare cases of people who are homozy- gous for the disease-causing allele have been reported. Such individuals INTERACTIVE EXERCISE tend to have more severe symptoms.
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