Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Question
Chapter 12.3, Problem 1R
Summary Introduction
To review:
The differences between expressivity and penetrance.
Introduction:
The expression of genes not only depends entirely on the genotype. Genotype is the genetic makeup of an individual. Various factors, which contribute to the overall expression of the gene range from surroundings, the temperature to lifestyle habits.
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Chapter 12 Solutions
Life: The Science of Biology
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- Explain the difference between the terms 'penetrance' and 'expressivity' and explain which term is best applied to an individual, and which one to a population of individuals. What is 'incomplete penetrance'?arrow_forwardWhat are The effects of random events on penetrance and expressivity?arrow_forwardIndicate and explain at least three examples of abnormalities in genes and chromosomesarrow_forward
- Contrast penetrance and expressivity as the terms relate to phenotypic expression.arrow_forwardDescribe how traits can exhibit incomplete penetrance and vary in their expressivity.arrow_forwardMany genetic disorders exhibit locus heterogeneity. Define andgive two examples of locus heterogeneity. How does locus heterogeneityconfound a pedigree analysis?arrow_forward
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