There are different types of gene mutation - AQA - A-Level Biology - Question 2 - 2018 - Paper 2
Question 2
There are different types of gene mutation.
Put a tick (√) in the box next to the statement which describes incorrectly the effect of the mutation in an exon of a g... show full transcript
Worked Solution & Example Answer:There are different types of gene mutation - AQA - A-Level Biology - Question 2 - 2018 - Paper 2
Step 1
A substitution may not result in a change to the encoded amino acid.
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Answer
This statement is correct. A substitution can result in a silent mutation that does not change the amino acid.
Step 2
An inversion will result in a change in the number of DNA bases.
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Answer
This statement is incorrect. An inversion does not add or remove DNA bases; it only changes their order.
Step 3
A deletion will result in a frame shift.
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Answer
This statement is correct. A deletion alters the reading frame of the codons, leading to a frame shift.
Step 4
An addition will result in a frame shift.
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Answer
This statement is correct. An addition also shifts the reading frame, thus altering the resulting protein.
