Question

what basic unit of heredity is found on segments of dna and are passed on from parent to offspring?
nucleotide
gene
phosphate molecule
deoxyribose sugar

Explanation:

Genes are the basic units of heredity. They are located on segments of DNA and are passed from parents to offspring, carrying genetic information. Nucleotides are the building - blocks of DNA, phosphate molecules and deoxyribose sugar are components of nucleotides.

Answer:

B. gene