Question

which statement is the best physical description of a gene?
genes carry many chromosomes.
a gene is a specific segment of dna on a chromosome.
a chromosome is a segment of a gene.
a gene consists of all the dna on a chromosome.

Explanation:

A gene is a specific segment of DNA on a chromosome. Chromosomes carry many genes, not the other way around. A chromosome is not a segment of a gene. A gene is not all the DNA on a chromosome; a chromosome has multiple genes and non - gene DNA segments.

Answer:

A gene is a specific segment of DNA on a chromosome.