Choose the incorrect option about penetrance.(a) If penetrance is 100% all recessive genotype shows one phenotype(b) If penetrance is 100% the expressivity is 100%(c) If penetrance is 100% all the heterozygotes have similar phenotype(d) If penetrance is 100% all the dominant genotypes have a different phenotype from recessiveI got this question in final exam.The above asked question is from Penetrance and Expressivity topic in division Regulating Gene Expression in Eukaryotes of Cytogenetics

Choose the incorrect option about penetrance.(a) If penetrance is 100%

1.	Choose the incorrect option about penetrance.(a) If penetrance is 100% all recessive genotype shows one phenotype(b) If penetrance is 100% the expressivity is 100%(c) If penetrance is 100% all the heterozygotes have similar phenotype(d) If penetrance is 100% all the dominant genotypes have a different phenotype from recessiveI got this question in final exam.The above asked question is from Penetrance and Expressivity topic in division Regulating Gene Expression in Eukaryotes of Cytogenetics
Answer» The CORRECT answer is (b) If penetrance is 100% the expressivity is 100% Best EXPLANATION: In case of penetrance being 100% it makes sure that a particular phenotype that is determined by the genotype is expressed in all individuals. But the limit to which it is expressed in the different individuals can vary so the expressivity MAY not ALWAYS be 100%.

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