Question

which best describes a gene?
a. a tetrad
b. a chromosome
c. a sister chromatid
d. a piece of a chromosome

Explanation:

A gene is a segment of DNA located on a chromosome. It contains the instructions for making proteins or functional RNA molecules. A tetrad is a group of four chromatids formed during meiosis. A chromosome is a larger structure that contains many genes. A sister chromatid is one of the two identical copies of a replicated chromosome. So, a gene is best described as a piece of a chromosome.

Answer:

D. A piece of a chromosome