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5.1 Inheritance

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Question 36
H

Skin colour in humans is controlled by several genes. It is also affected by how much sunlight the skin is exposed to.

Which statement describes and explains the variation in skin colour?

[1]
A

continuous variation, because many genes and the environment both affect it

B

discontinuous variation, because it is controlled by more than one gene

C

continuous variation, because each gene has a dominant and a recessive allele

D

discontinuous variation, because sunlight can only make the skin darker

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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