The world's first teacher with Down syndrome. Down syndrome is a condition caused by having an extra copy of chromosome 21.

The patient has only one short arm of chromosome 17

June 16, 2026

Peter Nowell, one of the discoverers of the Philadelphia chromosome, the chromosomal abnormality specific to CML leukemia, has passed away.

June 16, 2026
The world's first teacher with Down syndrome. Down syndrome is a condition caused by having an extra copy of chromosome 21.
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