Mutations Flashcards

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1
Q

What is a mutation?

A

A change in a DNA base caused by an error during interphase/DNA replication.

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2
Q

What is a mutagenetic agent and examples?

A

Increases the likelihood of gene mutations. For example x-rays, viruses, gamma rays, tobacco smoke.

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3
Q

What is a point mutation?

A

One ammino acid has changed in a sequence. (e.g:substitution)

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4
Q

What is a frameshift mutation?

A

Removal or insertion of a nucleotide and causes many nucleotides to change.

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5
Q

What is a nonsense mutation?

A

Results in 1 of 3 stop codons being formed.

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6
Q

What is a mis-sense mutation?

A

A different ammino acid is coded for.

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7
Q

What is a silent mutation?

A

Forms a different codon but no change to ammino acid formed.

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