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Mrs W A level Biology > Control of Gene Expression > Flashcards

Flashcards in Control of Gene Expression Deck (4)
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When might gene mutations take place?

During DNA replication.

DNA is vulnerable as it is single stranded.
Mistakes may take place in replication.


What happens in an addition gene mutation?

An extra nucleotide/base is added.

Causes a frame shift.


What happens in a deletion gene mutation?

A nucleotide/bade is removed.

Causes a frame shift.


What happens in a substitution gene mutation?

A nucleotide/base is removed and another put in its place.

Does not cause a frame shift.