Learning objective

Identify that gamete nuclei are haploid, while the nucleus of a zygote is diploid.

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Exam focus

Cambridge IGCSE BiologyReproductionSupplement content

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Quick explanation

This point belongs to Sexual reproduction, especially Sexual reproduction outcomes.
You need to be able to identify that gamete nuclei are haploid, while the nucleus of a zygote is diploid.
The key ideas to know are State.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

State

Why it matters

This objective helps connect Sexual reproduction outcomes to exam-style questions, flashcards, and revision notes for Sexual reproduction.

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Practice Questions7 linked questions

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Paper 4Theory (Extended)2 marks

Description

Gametes are reproductive cells that fuse during fertilization to form a zygote. The number of chromosome sets in their nuclei differs.

a
State the chromosome number in the nucleus of a gamete.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify the chromosome number in the nucleus of a zygote formed by fertilization.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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