3. What is the key to the recognition of codominance?
(A) The phenotype of the heterozygote falls between the phenotypes of the homozygotes.
(B) The trait exhibits a continuous distribution.
(C) The alleles affect more than one trait.
(D) The dominant allele is not always expressed.
(E) The heterozygote expresses the phenotype of both homozygotes.

答案：登入後查看
統計： A(6), B(3), C(2), D(0), E(35) #2308333

Astr

B1 · 2026/03/05

#7309731

What is the key to the recognition of codominance?

答案 E

(A) The phenotype of the heterozygote falls between the phenotypes of the homozygotes. 不完全顯性 Incomplete Dominance

(B) The trait exhibits a continuous distribution. 多基因遺傳 Polygenic Inheritance

(D) The dominant allele is not always expressed. 外顯率 Penetrance

(E) The heterozygote expresses the phenotype of both homozygotes.

Codominance 異型合子同時表現兩種性狀

共顯性遺傳，異型合子會同時顯現出兩種同型合子的性狀，而非兩者的中間