Question

Alleles are

• A. Different molecular forms of a gene
• B. Heterozygotes
• C. Different phenotype
• D. True breeding homozygotes

Answer 1

The correct option is A Different molecular forms of a gene

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.