Paper 2 Genetic diversity (mutations)

Question 1

What is gene mutation

Answer 1

A change in the base sequence of DNA (randomly occurs in DNA replication

Question 2

Mutations facts

Answer 2

More likely to occur if your expose to mutatagenic agents

could result in base deletion or substitution

Question 3

What are mutagenic agents

Answer 3

High energy radiation (uv light)
Ionising radiation ( Gamma ray/ x-rays
Cigarette smoke

Question 4

Impacts of base substitution

Answer 4

May have no impacts at all because new codon may still code for amino acid (genetic code is degenerate)

Question 5

Impacts of base deletion

Answer 5

Results in FRAMESHIFT, amino acids could be coded for incorrectly

Question 6

What is non-disjunction

Answer 6

Chromosomes /chromatids do not split equally in anaphase

can occur in 2 forms

Question 7

Name a form of non disjunction (1)

Answer 7

Polyploidy 1 change in WHOLE sets of chromosomes

Question 8

Name a form of non disjunction (2)

Answer 8

Aneuploidy 2 changed in numbers of individual chromosomes