“It was like a bomb was dropped!”

On May 22,1958, Doctor Jerome Lejeune leaned into his outdated microscope to study chromosomes taken from the tissue of a child with a genetic anomaly. With a sharp eye, he spotted something strange. Under typical circumstances, a baby is born with 46 chromosomes. This baby had as extra copy of chromosome 21. Lejeune leaned back … Read more“It was like a bomb was dropped!”