What is an allele? A.
a form of a gene

B.
a hairstyle

C.
a physical trait

Your answer would be A

Explanation:one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

i think that the best answer would be c.

tell me if im wrong : )