Question
What are genes? Where are they located?
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Answer
A gene is the basic physical and functional unit of heredity. Genes are made up of $DNA$. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred $DNA$ bases to more than $2$ million bases.
The total complement of genes in an organism or cell is known as its genome, which may be stored on one or more chromosomes. A chromosome consists of a single, very long $DNA$ helix on which thousands of genes are encoded. The region of the chromosome at which a particular gene is located is called its locus.
The total complement of genes in an organism or cell is known as its genome, which may be stored on one or more chromosomes. A chromosome consists of a single, very long $DNA$ helix on which thousands of genes are encoded. The region of the chromosome at which a particular gene is located is called its locus.
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