The Human Genome Contains About Three Billion Base Pairs

A truly gap-free human genome sequence was only published in 2022.

The tiny remaining difference accounts for the variation between individuals.

Adenine, thymine, cytosine and guanine pair up to form the rungs of the double helix.

Their model relied on X-ray images by Rosalind Franklin, and Watson, Crick and Maurice Wilkins won the Nobel Prize in 1962.