Skip to main content
O-LevelBiologyGenetics & Variation5090/11 · May/June 2013 · Q391 Mark

How many chromosomes are there in a zygote which develops into a baby with Down's syndrome?

A23
B24
C46
D47

✓ Correct answer

D: 47

Practise more questions on this topic

Oracle Prep sorts past-paper questions by topic, so you can drill Genetics & Variation and see which topics are most likely to come up next.

Sign up free →

About this question

Topic
Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2013 Paper 1 Variant 1, question 39.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Related Biology questions

© 2026 Oracle Prep