Genes and Genetic Diseases

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Deoxyribonucleic Acid (DNA)

Chromosomes contain genes.

Genes are the basic unit of inheritance and are composed of DNA.

DNA subunit or nucleotide contains

one pentose sugar (deoxyribose).

one phosphate group.

one nitrogenous base.

Cytosine (C), thymine (T), adenine (A), guanine (G)

DNA has a double helix structure.