Skip to content

Course home

6.2 Variation and evolution

6.2 Variation and evolution

EasyMediumHard
12345678910111213141516171819202122232425262728293031
Question 3
H

Mutations occur continuously in the cells of all organisms.

a.

Describe what happens to the DNA of a cell when a mutation occurs.

[1]
b.

One human cell contains 6.0 × 109 DNA bases. On average, 1 in every 3.0 × 108 of these bases has been changed by a mutation.

Calculate the mean number of changed bases in one human cell.

[2]
c.

Most mutations do not change the phenotype of a person. Suggest one reason why.

[1]
Markscheme

6.2 Variation and evolution Questions

  1. GCSE
  2. /Biology
  3. /6.2 Variation and evolution

44 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank