Mutations During Meiosis

Question 1

How does a gene mutation occur

Answer 1

A change in the base sequence of chromosomes

Question 2

What happens in a genetic mutation

Answer 2

• mutation changed amino acid coded for
• changed primary structure which is the sequence of amino acids
• this changes the tertiary structure
• as the h, ionic and disqualified bridges form in different places
• changes 3d shape and 3 function

Question 3

Why do not all base substitutions cause a change in the sequence of amino acids

Answer 3

Due to the degenerate nature of the genetic code

Question 4

What are the 3 mutations

Answer 4

Substitution mutation
Frame shift mutation
Non disjunction mutation

Question 5

What is a substitution mutation

Answer 5

One base is swapped for another
Often doesn’t have an affect due to degenerate
Only affects 1 amino acid coded

Question 6

What is a frame shift mutation

Answer 6

Insertion or deletion of a base occurs
All following codons are affected
Large effect -> prim stcrure-> tertiary-> diff 3d

Question 7

What is a non disjunction mutation

Answer 7

Sister chromatids don’t separated in meiosis 2 leading to extra chromosomes