Non-disjunction and Down Syndrome (2016) IB Biology

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