3. Extensions to Mendelian Inheritance
Penetrance and Expressivity
3. Extensions to Mendelian Inheritance
Penetrance and Expressivity - Video Tutorials & Practice Problems
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Penetrance and Expressivity
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Problem
ProblemA group of individuals exhibit a range of intermediate phenotype between dominant and recessive. What term measures this phenotype?
A
Incomplete dominance
B
Penetrance
C
Expressivity
D
Epistasis
3
Problem
ProblemPenetrance measures which of the following?
A
The degree to which an allele is expressed
B
The effect of two genes on a single trait
C
A single intermediate phenotype between dominant and recessive
D
The percentage of individuals with a given allele who exhibit the phenotype
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PRACTICE PROBLEMS AND ACTIVITIES (6)
- Define and distinguish incomplete penetrance and variable expressivity.
- Brachydactyly type D is a human autosomal dominant condition in which the thumbs are abnormally short and broa...
- Brachydactyly type D is a human autosomal dominant condition in which the thumbs are abnormally short and broa...
- In goats, the development of the beard is due to a recessive gene. The following cross involving true-breeding...
- Discuss the topic of phenotypic expression and the many factors that impinge on it.
- Contrast penetrance and expressivity as the terms relate to phenotypic expression.