Question

what is an allele? a) an alternative form of a gene b) a type of chromosome c) a type of cell d) the position of a nucleotide

Explanation:

An allele is defined as an alternative form of a gene. Genes are segments of DNA that code for a particular trait, and different alleles can result in different expressions of that trait. Chromosomes contain genes and alleles, cells are the basic unit of life and nucleotides are building - blocks of DNA. But an allele is specifically an alternative form of a gene.

Answer:

A. An alternative form of a gene