A scientist studies cells from a gecko species. A sperm cell from this species contains 19 chromosomes.
An automated counter records the total number of chromosomes in each sample.
| Sample | Number of cells | Total number of chromosomes in the sample |
|---|---|---|
| L | 14 | 266 |
| M | 5 | 190 |
Calculate the percentage of all the cells sampled that are diploid.
Give your answer to three significant figures.
Explain why meiosis is needed before fertilisation in this gecko species.
92 exam-style questions on Edexcel GCSE Biology 3.1 Reproduction and meiosis, covering 3.1.1 Advantages and disadvantages of reproduction and 3.1.2 Role of meiotic cell division. Each one has a worked solution and a mark scheme showing where the marks go.