When the effects of genes combine to create the phenotype, they are called "_____ genes."
A) dominant
B) recessive
C) additive
D) nonadditive

Question

Quizplus · Accepted Answer

Additive genes are genes that contribute to the phenotype in an additive manner, meaning that each gene adds a specific amount to the phenotype. This is in contrast to dominant or recessive genes, which have a more binary effect on the phenotype. Nonadditive genes would not contribute to the phenotype in a predictable or additive manner.

When the Effects of Genes Combine to Create the Phenotype