👤 whose
Whose research helped reveal the first human chromosome-linked syndrome caused by an extra chromosome 21?
Quick Answer
Jérôme Lejeune identified the chromosomal cause of Down syndrome in 1959. He showed that the condition is caused by trisomy 21.
The Full Story
Jérôme Lejeune, a French physician and geneticist, helped establish that Down syndrome is caused by an extra copy of chromosome 21. In 1959, his team showed the chromosomal basis of the condition, a major breakthrough in medical genetics. This discovery linked a specific developmental syndrome to a clear genetic abnormality. It changed how scientists understood chromosome disorders.
Key Facts
1.Trisomy 21 was identified in 1959
2.The condition involves 3 copies of chromosome 21
3.Lejeune’s work linked genetics to a clinical syndrome
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Suggested video title for this topic:
"The discovery that connected a syndrome to a single extra chromosome"
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