An Allele Is

Question

An allele is
A) a version of a gene.
B) a trait that can be affected by the external environment.
C) always codominant to its counterpart in another chromosome.
D) the result of a change in phenotype.

Accepted Answer

An allele is a specific version of a gene that determines a particular trait. It may be dominant or recessive, and its expression can be influenced by environmental factors, but it is not always codominant with its counterpart in another chromosome. A change in phenotype may be caused by various factors, including mutations or environmental factors, but it is not the definition of an allele.