Red-green colour blindness is a defect of the eye. People with red-green colour blindness find it difficult to tell red and green apart.
The Table shows the percentage of males and females in the UK with red-green colour blindness.
Table
| Group | Percentage with red-green colour blindness |
|---|---|
| males | 8.0 |
| females | 0.5 |
Name the type of cell in the retina that detects colour.
A school has 600 male students and 600 female students.
Use the Table to calculate how many more male students than female students would be expected to have red-green colour blindness.
Explain why a person with red-green colour blindness cannot tell red and green apart.
A person with red-green colour blindness can see as well as other people in dim light.
Explain why.
135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.