Mutations Flashcards
(9 cards)
1
Q
What is a Mutation?
A
A change of bases in the DNA sequence.
2
Q
What is Substitution?
A
Where one base replaces another
E.g. ACG -> AGG
3
Q
What is Deletion?
A
Where a base is taken away
E.G. TGCAACGCT -> TGCGCT
4
Q
What is Insertion?
A
Where a base is added
E.G. TGCAACGCT -> TGCAACGCTTAG
5
Q
When does frameshift occur?
A
Only when their is a insertion or deletion
6
Q
What causes Mutations?
A
Physical or chemical factors
E.G. asbestos,alcohol,tobacco or radiation.
7
Q
How many bases are codons made of?
A
3 bases
8
Q
Why does Mutation occur?
A
For evolution
9
Q
Non-Disjunction
A
Where a whole chromosome is missing or there’s an extra chromosome
