Ch.15 - Chromosomal Theory of InheritanceWorksheetSee all chapters
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Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
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Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
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Ch.23 - Evolution by Natural Selection
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Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Solution: The following pedigree depicts the inheritance of a hereditary disease affecting the heart. What is the most likely mode of inheritance of this disease? Pay particular attention to individuals 10 &amp

Problem

The following pedigree depicts the inheritance of a hereditary disease affecting the heart. What is the most likely mode of inheritance of this disease? Pay particular attention to individuals 10 & 11.

A. autosomal dominant

B. autosomal recessive

C. X-linked recessive

D. Y-linked

E. X-linked dominant

Solution

For better understanding of this problem, we'll try to discuss how each wrong answer cannot be correct.

We will eliminate the least likely first.

This is definitely not Y-linked since it can be seen to skip most of the sons of affected fathers.

This is also not autosomal dominant. This can be proven by the progeny of 1 & 2 as it has shown to skip a generation.

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