19 Genetics Of Living Systems

Question 1

What is a mutation

Answer 1

Change in sequence of bases of DNA

Question 2

What causes a change in sequence of bases ?

Answer 2

Substitution
Deletion
Insertion
- of one or more nucleotides within a gene

Question 3

If only one nucleotide affected what is the mutation called?

Answer 3

Point mutation

Question 4

Insertion or deletion of a nucleotide leads to what kind of mutation?

Answer 4

Frameshift mutation - shifts the reading frame of the sequence of bases. Changes every successive codon

Question 5

3 different effects of different mutations

Answer 5

No effect - no effect on phenotype

Damaging- phenotype affected negatively because proteins are no longer synthesised or are non functional

Beneficial -