Penetrance and ExpressivityPenetrance and Expressivity

Penetrance: Penetrance: in a population of in a population of individuals with the same genotype, individuals with the same genotype, thethe percentage percentage who exhibit the who exhibit the phenotype for that genotype phenotype for that genotype

Expressivity:Expressivity: for a given genotype, for a given genotype, the the degreedegree to which the phenotype is to which the phenotype is expressedexpressed

Piebald Spotting In BeaglesPiebald Spotting In Beagles

Every individual shown has the same Every individual shown has the same genotype for this gene.genotype for this gene.