What are genes?

The functional and physical unit of heredity is named as a gene. Alleles are forms of the same gene with small differences in their sequence of DNA bases. Genes are found on tiny spaghetti-like structures called chromosomes. Genes determine what the organism is like, its appearance, how it survives, and how it behaves in its environment. genes are made of a substance called deoxyribonucleic acid, or DNA.

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