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5.1 Inheritance

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Question 21

Which of the following statements best describes the effect that the majority of mutations have on an organism's phenotype?

A

They have a neutral effect, resulting in no observable change to the phenotype.

B

They are highly beneficial, immediately improving the organism's fitness.

C

They are highly harmful, leading to the immediate death of the organism.

D

They alter the cell's phenotype without changing its genetic sequence.

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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