Answered: Duchenne muscular dystrophy is an…

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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Duchenne muscular dystrophy is an inheritable disorder that results in muscle weakness, leading to walking and breathing difficulties and heart disease.

Which of the following is a valid conclusion about the Duchenne muscular dystrophy pedigree shown above?

Select one:

a. Only individuals I-2 and II-4 are confirmed carriers of the Duchenne muscular dystrophy allele.

b. Individual II-3 can only pass on the Duchenne muscular dystrophy allele to individuals III-2 and III-4.

c. Without further evidence, the genotypes of individuals II-2 and III-2 cannot be determined.

d. Only individuals I-1 and II-3 are confirmed carriers of the Duchenne muscular dystrophy allele.

Pedigree Conventions
Identical
twins
Male
Female
Non-identical
twins
Mating
Affected
individuals
Mating between
close relatives
Unaffected
individuals
Roman numerals
symbolize generations
Arabic numbers
II ON
symbolize individuals
within a given
generation
1
2 3
Birth order, within each
group of offspring, is
drawn left to right,
oldest to youngest

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