Biology
Grade-10
Easy
Question
Consider a population in which every individual carries the same R allele combinations for increased bone density; however, it occurs that only 78% of the population actually expresses the phenotype. What is the percentage of penetrance of this trait in this population?
Penetrance is 32%
Penetrance is 78%
There is no penetrance at all
The trait shows 100% penetrance
Penetrance is 32%
Penetrance is 78%
There is no penetrance at all
The trait shows 100% penetrance
Hint:
Penetrance is 78%
The correct answer is: Penetrance is 78%
The extent to which a particular gene or set of genes is expressed in the phenotypes of individuals carrying it, measured by the proportion of carriers showing the characteristic phenotype. Here only 78% of the population actually expresses the phenotype. Hence the penetrance is 78%.
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