Cambridge IGCSE Biology practice

Paper 3 structured question: Chromosomes, genes and proteins

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Chromosomes, genes and proteins

Exam-style question

Try this first

Paper 3Theory (Core)1 marks

Inheritance of sex in humans

Description

A child inherits one sex chromosome from each parent. Females have XX chromosomes, males have XY chromosomes.

a
Identify the sex chromosome combination for a male child.
Your answer
Aim for approximately 1 distinct marking point.
[1]

0 of 1 part answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Flashcard 1 of 6

Press Space to flip, arrows to move

Paper 3Theory (Core)2 marks

Diagram Description

Diagram shows a mother with XX chromosomes and a father with XY chromosomes producing offspring.

Parent	Sex Chromosomes
Mother	XX
Father	XY

a
Describe how the sex of a child is determined in humans.
Your answer
Aim for approximately 2 distinct marking points.
[2]