Which of the Following is TRUE About Alleles

Question

Which of the following is TRUE about alleles?
A)Individuals carry both forms of each allele.
B)Alleles come in two forms,the good form and the bad form.
C)The phenotype of the individual will always indicate with certainty the alleles of the individual.
D)An allele is a variant form of a gene.
E)An individual will only carry one version of an allele.

Accepted Answer

An allele is a variant form of a gene, meaning that there can be multiple alleles for the same gene. This allows for genetic diversity within a population. A and E are incorrect as individuals can carry two different versions of an allele (one from each parent) and therefore may carry different forms. B is incorrect as alleles can have different effects depending on the context in which they are expressed, and there is not necessarily a "good" or "bad" form. C is incorrect as certain alleles can be recessive and not expressed in the phenotype, making it difficult to determine an individual's alleles just by looking at their physical appearance.