Question

genes are segments of dna that are the basic unit of heredity. they are passed on from parent to offspring. the gene form of a trait is called a(n) an organisms allele combination is ca the physical appearance of an organi done

Explanation:

Alleles are different forms of a gene that code for variations of a trait. For example, in pea plants, there is an allele for tallness and an allele for shortness.

Answer:

allele