If the gene expresses itself then its penetrance is?
Correct answer: D. 100%
- A. 40%
- B. 50%
- C. 75%
- D. 100%
Explanation
Penetrance is the extent to which a particular gene or set of genes is expressed in the phenotypes of individuals carrying it. It is measured by the proportion of carriers showing the characteristic phenotype. Since If a gene expresses itself in a specific phenotype, then the penetrance will be 100% or 1. So, option D is correct.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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