20.1 Gene Mutations Flashcards Preview

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Flashcards in 20.1 Gene Mutations Deck (9)
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1
Q

Gene mutation definition

A

Any change to one or more nucleotide bases, or any arrangement of the bases in DNA

2
Q

Substitution of bases definition

A

Nucleotide is replaced by another nucleotide that has a different base

3
Q

Deletion of bases definition

A

Loss of a nucleotide from a DNA sequence

4
Q

Addition of bases definition

A

An extra base becomes inserted in the sequence

5
Q

Duplication of bases definition

A

One or more bases are repeated

6
Q

Inversion of bases definition

A

A group of bases become separated from the DNA sequence and join at the same position but in the reverse order

7
Q

Translocation of bases definition

A

A group of bases become separated from the DNA sequence in one chromosome and become inserted into the DNA sequence of a different chromosome

8
Q

What are mutagenic agents?

A

Outside factors that can increase the rate of mutation

9
Q

Examples of mutagenic agents

A
  • high energy ionising radiation

- chemicals (NO2)