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Cambridge IGCSE Biology practice

Paper 3 structured question: Monohybrid inheritance

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Monohybrid inheritance

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Paper 3Theory (Core)1 marks

Genetics and inheritance

Description

Definition of heterozygous

An organism inherits two alleles for each gene, one from each parent. Sometimes these alleles are different.

  1. a

    State what is meant by heterozygous?

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Monohybrid inheritance

Paper 3Theory (Core)2 marks

Description

Heterozygous organisms

An organism has two alleles for a gene: one allele codes for brown eyes and the other codes for blue eyes.

  1. a

    Describe what is meant by heterozygous in this example?

    Aim for approximately 2 distinct marking points.

    [2]