"Incomplete penetrance" describes a situation where
- A
An individual's phenotype is determined entirely by environment, not genotype
- B
Every individual with a particular genotype always shows the expected phenotype
- Ccheck_circle
Some individuals with a particular genotype do not show the expected phenotype
- D
Mutations arise at unusually high frequency at a particular gene locus
Explanation
Some genotypes don't always produce the expected phenotype due to environmental modifiers, modifier genes, or chance.