science
Grade-10
Easy

Question

What is the structural and functional unit of heredity?

  1. Gene

  2. Chromosome

  3. DNA

  4. RNA

hintHint:

This information is present inside the nucleus.

The correct answer is:

Gene


    • Genes are the basic physical and functional units of heredity. Genes are made of DNA. Some genes act as instructions for making molecules called proteins.
    • However, many genes do not code for proteins. Everyone has two copies of each gene, that one inherits from each parent.
    • Most genes are the same in all people, but a small number (less than 1% of all) differ slightly from person to person.
    • Alleles are forms of the same gene with slight differences in the sequence of DNA bases. These small differences contribute to each person's unique physical characteristics.

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