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Mutation concept definition
Evolution of new species occurs by mutation and natural selection.
What is a mutation?
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Marking points
- 1 Defines a mutation as an accepted change to DNA/genetic material or chromosome number.
Full-mark answer
A mutation is a change in the DNA base sequence.
Why this answer loses marks
A mutation is genetic variation.
This is too vague: the definition must identify genetic material or chromosome number and say that it changes.