Mutations Flashcards
1
Q
What are gene mutations?
A
A change in the DNA base sequence of chromosomes
2
Q
Give two types of gene mutation
A
- Substitution - one base is substituted with another
- Deletion - one base is deleted
3
Q
What happens if a mutation occurs in a gene?
A
The sequence of amino acids it codes for (and the protein formed) could be altered
4
Q
What are mutagenic agents?
A
They increase the risk of mutation
5
Q
Give four examples of mutagenic agents
A
- Ultraviolet radiation
- Ionising radiation
- Some chemicals
- Some viruses
