Question

what is gene?what is its chemical composition ​

Answer 1

Answer:

A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins.Genes are composed of deoxyribonucleic acid (DNA), except in some viruses, which have genes consisting of a closely related compound called ribonucleic acid (RNA).

Answer 2

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A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins.

In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.

Genes are made up of DNA. Each chromosome contains many genes.