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5.1 Inheritance

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Question 15

The diploid number of chromosomes in this animal species is 36. The table shows the number of chromosomes in the nuclei of four cells from the species.

CellNumber of chromosomes
Skin cell36
Sperm cell18
Liver cell36
Egg cell18

Name the two cells in the table that are gametes. Explain how the chromosome numbers of these cells allow fertilisation to produce a diploid zygote.

[3]
Markscheme

5.1 Inheritance Questions

  1. GCSE
  2. /Biology
  3. /5.1 Inheritance

186 exam-style questions on OCR GCSE Biology 5.1 Inheritance, covering 5.1.1 The genome, 5.1.2 Environment and phenotype, 5.1.3 Variants and mutations, 5.1.4 How genetic variants influence phenotype, 5.1.5 Asexual and sexual reproduction, 5.1.6 Haploid and diploid, 5.1.7 Meiotic cell division, 5.1.8 Single gene inheritance, 5.1.9 Predicting single gene crosses, 5.1.10 Sex determination, 5.1.11 Multiple gene inheritance, and 5.1.12 Development of our understanding of genetics. Each one has a worked solution and a mark scheme showing where the marks go.

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