In ____,a pair of nonidentical alleles affecting the phenotypes of a given trait are both expressed at the same time in heterozygotes.
A) pleiotropy
B) polygenic inheritance
C) complete dominance
D) codominance
E) a multiple allele system

Question

In ____,a pair of nonidentical alleles affecting the phenotypes of a given trait are both expressed at the same time in heterozygotes.  
A) pleiotropy
B) polygenic inheritance
C) complete dominance
D) codominance
E) a multiple allele system

Quizplus · Accepted Answer

Codominance occurs when both alleles in a heterozygous individual are expressed equally and simultaneously, creating a new phenotype. This is in contrast to incomplete dominance, where the heterozygous individual displays a phenotype that is intermediate between the two homozygous phenotypes.

In ____,A Pair of Nonidentical Alleles Affecting the Phenotypes of a Given