Mutation

Question 1

What is a gene mutation?

Answer 1

Change to the base sequence of DNA, resulting in the formation of a new allele

Question 2

Substitution

Answer 2

Swapping on base for a different base (G to T)

Question 3

Deletion

Answer 3

One base is removed, causing a frame shift, changing all the following triplets/codons

Question 4

Chromosome non-disjunction

Answer 4

Chromosomes don’t separate properly during meiosis, causing an uneven number of chromosomes in the gametes

Question 5

Mutagenic agents

Answer 5

Things that cause an increase in probability/rate of mutation (eg. UV radiation, ionising radiation)