A trait shows ____ if the phenotype of that trait is present in less than 100% of those with the related genotype.

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Incomplete penetrance refers to the situation in which an individual with a particular genotype does not necessarily express the corresponding phenotype. This is typically seen in traits that are autosomal dominant or autosomal recessive, but incomplete penetrance can also occur with X-linked traits. In contrast, incomplete dominance refers to a situation in which heterozygotes have a phenotype that is intermediate between the two homozygous genotypes, and incomplete expressivity refers to a situation in which individuals with the same genotype have variable phenotypes.

A Trait Shows ____ If the Phenotype of That Trait