Question

Which of the following statements is a correct explanation for the observation that all offspring exhibit a phenotype for a particular trait that appears to be a blend of the two parental varieties? A) Neither of the parental genes is dominate over the other. B) The genes for the trait are dominant in both of the parents. C) The genes are linked and do not separate during meiosis. D) The genes for the trait are recessive in both of the parents.

Answer 1

The correct answer is: A) Neither of the parental genes is dominant over the other.

Step-by-step explanation:

When a certain offspring exhibits a phenotype that is a blend of the two parental alleles, it's because the parents' genes are codominant.

Codominance is a phenomenon that happens when an individual shows traits of both parents simultaneously. This happens to certain genes when one parent is homozygous for the trait and the other parent is homozygous for the other allele of the same gene.

The most common example for codominance occurs in blood type: when an homozygous for type A blood has offspring with an homozygous for type B blood, this offspring will have type AB blood.