Uploaded January 2016 | Updated September 2026, 3 weeks ago

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3.3 Meiosis: Non-disjunction and Down Syndrome

Understanding that:

- A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length and can deduce sex and diagnose Down syndrome in humans
- Down syndrome is caused by non-disjunction
- Non-disjunction is when the halving of the chromosome is not properly performed