IB Biology SL 2.3.10 Non-disjunction and trisomy Question Bank
Practise IB Biology SL 2.3.10 by explaining how non-disjunction creates gametes with abnormal chromosome numbers.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain how non-disjunction during meiosis can cause trisomy.
- Interpret karyograms and chromosome counts for Down or Edwards syndrome.
D2.1.10—Down syndrome question 1
The following sequence of pictures, made using an electronic imaging technique, shows a cell undergoing division.
Image I
Explain, using one example, how non-disjunction in meiosis can lead to changes in chromosome number.
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