Edexcel IGCSE Biology 3.32 In human cells the diploid number of chromosomes
Practise using chromosome diagrams and human gamete contexts to distinguish diploid 46 from haploid 23 clearly.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- identify human sperm or egg nuclei as haploid with 23 chromosomes
- explain diploid as two chromosome sets or 23 pairs, compared with one haploid set
3.32 Human diploid and haploid chromosome numbers question 1
The diagram shows the human female reproductive system with some structures labelled.
For fertilisation to occur, a sperm needs to reach an ovum.
Which of these describes the number of chromosomes in the nucleus of a human sperm?
A
diploid number of 23 chromosomes
B
diploid number of 46 chromosomes
C
haploid number of 23 chromosomes
D
haploid number of 46 chromosomes
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