In a model of sperm production, 30 diploid cells each complete meiosis. One-quarter of the resulting sperm cells are unable to fertilise eggs. Each remaining sperm fertilises one egg.
What is the maximum number of zygotes formed?
90 zygotes
30 zygotes
120 zygotes
160 zygotes
40 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.