Question

what is a gene? the different forms of a trait a segment of dna that is the basic unit of heredity the appearance or characteristics that are seen in an organism an organisms allele combination

Explanation:

A gene is defined as a segment of DNA that serves as the basic unit of heredity. It contains the instructions for making proteins or functional RNA molecules, which influence the traits of an organism. The different forms of a trait are alleles. The appearance or characteristics seen in an organism is the phenotype. An organism's allele - combination is the genotype.

Answer:

B. a segment of DNA that is the basic unit of heredity