text: James Watson ni Francis Crick yɛ ADN kɛ cɔgɔ yiran san 1953, u yɛ barakɛ ni Rosalind Franklin ani Maurice Wilkins hakilina yɛ min ya yiran ko hɛlikoyidal de bi ADN kɛcɔgɔ (o kɔrɔ yɛ ko tir bucon cogo).