Question

osteogenesis imperfecta is caused by a dominant allele but not all people with this allele actually suffer from the disease. what is this phenomenon called? multiple choice codominance recession incomplete dominance dominance penetrance

Explanation:

Penetrance is the term for the proportion of individuals with a specific genotype (here, the dominant allele for osteogenesis imperfecta) that actually exhibit the associated phenotype (the disease). The other options do not fit: codominance refers to both alleles being expressed, incomplete dominance is a blended phenotype, dominance describes allele expression hierarchy, and recession refers to economic decline, not genetics.

Answer:

Penetrance