Mutations extended answer

Question 1

Notes on single gene mutations 1, 2, 3 and 4

Answer 1

1. Single gene mutations are random changes in DNA sequences.
2. Single gene mutation name and description of substitution
3. Single gene mutation name and description V2
4. If either 2 or 3 not given all 3 mutation names.

Question 2

Notes on single gene mutations 5, 6 and 7

Answer 2

5. Insertion and deletion mutations result in a frameshift mutation.
6. Single nucleotide substitutions include missense, nonsense and splice site mutations.
7. Splice site mutations can alter the mature mRNA transcript.

Question 3

Notes on chromosome mutations a, b, c, d, and e

Answer 3

a) Chromosome mutation can involve changes to chromosome number or structure.
b) Chromosome mutation name and description V1
c) Chromosome mutation name and description V2
d) Chromosome mutation name and description V3
e) If one of those is not done all 4 names.

Question 4

Notes on chromosome mutations f and g

Answer 4

f) Gene duplication can have importance in evolution

g) explanation on how gene duplication’s importance (functional forms still present)