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3.3 Inheritance

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Question 30
H

A woman with a recessive sex-linked condition has genotype XhXhX^hX^hXhXh. Her partner does not have the condition and has genotype XHYX^HYXHY.

Which statement describes their expected children?

[1]
A

All daughters are affected and all sons are unaffected.

B

Half the sons are affected and all daughters are carriers.

C

Half the daughters are affected and all sons are unaffected.

D

All sons are affected and all daughters are carriers.

Markscheme

3.3 Inheritance Questions

  1. GCSE
  2. /Biology
  3. /3.3 Inheritance

43 exam-style questions on Edexcel GCSE Biology 3.3 Inheritance, covering 3.3.1 Gregor Mendel and the basis of genetics, 3.3.2 Alleles and inherited characteristics, 3.3.3 Monohybrid inheritance, 3.3.4 Determination of sex at fertilisation, 3.3.5 Outcomes from monohybrid crosses, 3.3.6 Inheritance of ABO blood groups, 3.3.7 Inheritance of sex-linked disorders, and 3.3.8 Multiple genes and phenotypic features. Each one has a worked solution and a mark scheme showing where the marks go.

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