Gene mutations

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5 Terms

1
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What are the ways in which the base sequence of DNA may be changed?

addition of bases

deletion of bases

substitution of bases

duplication of bases

inversion of bases

translocation of bases

2
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What is inversion of bases?

a group of bases becomes separated from the DNA sequences and rejoin at the same position but in the inverse order

3
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What is translocation of bases?

a group of bases becomes separated from the DNA sequence on one chromosome and becomes inserted into the DNA sequence of a different chromosome

4
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What are examples of mutagenic agents?

high energy ionising radiation

chemicals

5
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What do mutagenic agents do?

increase the mutation rate