CAIE IGCSE Biology 16.2.3 Haploid Gametes & Diploid Zygotes

Practise classifying gamete nuclei as haploid and zygote nuclei as diploid, including human chromosome numbers.

Exam points

state that gamete nuclei are haploid and contain one set of chromosomes
state that a zygote nucleus is diploid after fertilisation restores two sets
apply 23 chromosomes to human gametes and 46 chromosomes to a human zygote

[Maximum number: 2]

Fig. 4.1 is a diagram of the human female reproductive system.

Fig. 4.1

Fertilisation is the fusion of the nuclei of a male gamete and a female gamete resulting in a zygote.

State the number of chromosomes present in a human:
female gamete
zygote

All question bank results loaded

16.2.3—Nuclei of gametes are haploid and that question 1