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5.1 Inheritance

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Question 18

Why is the halving of the chromosome number during meiosis essential for sexual reproduction?

A

It ensures that offspring are genetically identical to one of the parents.

B

It prevents any environmental mutations from being inherited by the offspring.

C

It allows fertilization to restore the normal diploid chromosome number in the zygote.

D

It increases the volume of the cytoplasm in the resulting gametes.

Markscheme

5.1 Inheritance Questions

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

97 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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