Cambridge IGCSE Biology practice

Paper 3 structured question: Monohybrid inheritance

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Paper

Marks

Topic

Monohybrid inheritance

Exam-style question

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Paper 3Theory (Core)1 marks

Genetics and inheritance

Description

A recessive allele is one that is expressed in the phenotype only when no dominant allele is present in the genotype.

a
Describe what is meant by a recessive allele?
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Description

A recessive allele is expressed in the phenotype only when no dominant allele is present in the genotype.

a
State when a recessive allele is expressed in the phenotype.
Your answer
Aim for approximately 2 distinct marking points.
[2]