Question 1
FHydrangeas are garden plants.
A gardener took two cuttings from the same parent hydrangea plant. The cuttings are genetically identical.
She grew one cutting in soil with a pH of 5 and the other cutting in soil with a pH of 8.
The Figure shows the two plants when they had flowered.
Figure
a.[1]
Use the Figure to describe the effect of soil pH on the colour of hydrangea flowers.
b.[2]
Explain why the gardener used cuttings from the same parent plant.
c.[1]
State the type of variation shown by the flower colour of these two plants.
d.[2]
The gardener took a cutting from the plant with pink flowers and grew it in soil with a pH of 5.
Predict the colour of the flowers on this new plant. Explain your answer.
3.4 Variation and the Human Genome Project Questions
40 exam-style questions on Edexcel GCSE Biology 3.4 Variation and the Human Genome Project, covering 3.4.1 Causes of variation, 3.4.2 Outcomes of the Human Genome Project, 3.4.3 Genetic variation within a population, and 3.4.4 Effects of genetic mutations on phenotype. Each one has a worked solution and a mark scheme showing where the marks go.