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3.3 Inheritance

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Question 11
H

A woman has blood group A. Her child has blood group O.

Two men could be the father of the child. Man 1 has blood group AB. Man 2 has blood group B.

a.

Give the genotype of the child.

[1]
b.

Give the genotype of the woman. Explain your answer.

[2]
c.

Explain which man could be the father of the child.

[3]
d.

Man 2 is the father of the child.

Calculate the probability that the next child of this couple will have blood group B.

[2]
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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