Edexcel IGCSE Biology · Spec 3.34
Mutation
What a mutation is and how mutations create new alleles and increase variation.
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Mutation
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Spec 3.34
What you need to know
- Define a mutation
- Know that mutations are rare and random
- Know what can increase the rate of mutation
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Quick check
Answer each question before opening the answer.
What is a mutation?
A random change in the base sequence of DNA.
What can increase the rate of mutation?
Ionising radiation (e.g. UV, X-rays, gamma) and some chemicals (mutagens).
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