Franskur arvagranskari, sum rakti við arvaliga upprunan av Down syndrom (mongolismu). Hann var vísundamaður, og professari í arvaeginleikum í meira enn 20 ár, og arbeiddi á Hôpital des Enfants Malades (barnasjúkrahúsinum) í París. Jérôme Lejeune doyði 3. apríl 1994.
“I see no difference between the early person that you were at conception and the late person which you are now. You were, and are, a human being.”
“On the tiny mini-cassettes which are our chromosomes are written various parts of the opus which is for human symphony, and as soon as all the information necessary and sufficient to spell the whole symphony (is brought together), this symphony plays itself, that is, a new man is beginning his career … as soon as he has been conceived, a man is a man.”
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