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Monohybrid inheritance: CAIE IGCSE Biology questions

Every CAIE IGCSE Biology exam question on 17.4 Monohybrid inheritance, June 2024 and the specimen papers, with its mark scheme and examiner’s report.

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346 questions

  1. Q34

    June 2024 · Paper 2

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    June 2024 Paper 2, question 34: The pedigree diagrams show the pattern of inheritance of a genetic disorder in four families. This genetic disorder is not sex-linked. Which pedigree diagram pr

  2. Q32

    Specimen · Paper 1

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 1, question 32: The genetic diagram shows a monohybrid cross. H is the dominant allele and h is the recessive allele. parent 1 2 genotypes gametes H h h h offspring 3 4 5 6 gen

  3. Q32

    Specimen · Paper 2

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 2, question 32: A man marries a woman who has a different blood group from him. They have two children. The children have different blood groups from each other and different b

  4. Q33

    Specimen · Paper 2

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 2, question 33: Pure-breeding black-feathered chickens are mated with pure-breeding white-feathered chickens. All of the offspring (F1 generation) have black feathers and white

  5. Q3(a)(i)

    Specimen · Paper 3

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 3, question 3(a)(i): State the number of goats in Fig. 3.2 that have white fur. [1]

  6. Q3(a)(ii)

    Specimen · Paper 3

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 3, question 3(a)(ii): State the phenotype of goat 5. [1]

  7. Q3(a)(iii)

    Specimen · Paper 3

    2 marks17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 3, question 3(a)(iii): Circle two terms that can be used to describe the genotype of goat 6. black dominant heterozygous homozygous recessive white [2]

  8. Q3(c)

    Specimen · Paper 3

    3 marks17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 3, question 3(c): A farmer identified two goats to breed together. • The genotype of the male goat is Aa. • The genotype of the female goat is Aa. Complete the Punnett square and

  9. Q3(c)(i)

    Specimen · Paper 4

    3 marks17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 4, question 3(c)(i): State the genotypes of the people identified as P, Q and R in Fig. 3.3. P Q R [3]

  10. Q3(c)(ii)

    Specimen · Paper 4

    1 mark17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 4, question 3(c)(ii): The couple S and T are expecting another child. State the probability that the child will have haemophilia. [1]

  11. Q3(c)(iii)

    Specimen · Paper 4

    2 marks17.4 Monohybrid inheritance
    The whole paper ↗
    Specimen Paper 4, question 3(c)(iii): Describe what is meant by the term sex-linked characteristic. [2] [Total: 15]
All 11 questions on Monohybrid inheritance, as a list
  1. June 2024, Paper 2, Q34 (1 mark): The pedigree diagrams show the pattern of inheritance of a genetic disorder in four families. This genetic disorder is not sex-linked. Which pedigree diagram pr
  2. Specimen, Paper 1, Q32 (1 mark): The genetic diagram shows a monohybrid cross. H is the dominant allele and h is the recessive allele. parent 1 2 genotypes gametes H h h h offspring 3 4 5 6 gen
  3. Specimen, Paper 2, Q32 (1 mark): A man marries a woman who has a different blood group from him. They have two children. The children have different blood groups from each other and different b
  4. Specimen, Paper 2, Q33 (1 mark): Pure-breeding black-feathered chickens are mated with pure-breeding white-feathered chickens. All of the offspring (F1 generation) have black feathers and white
  5. Specimen, Paper 3, Q3(a)(i) (1 mark): State the number of goats in Fig. 3.2 that have white fur. [1]
  6. Specimen, Paper 3, Q3(a)(ii) (1 mark): State the phenotype of goat 5. [1]
  7. Specimen, Paper 3, Q3(a)(iii) (2 marks): Circle two terms that can be used to describe the genotype of goat 6. black dominant heterozygous homozygous recessive white [2]
  8. Specimen, Paper 3, Q3(c) (3 marks): A farmer identified two goats to breed together. • The genotype of the male goat is Aa. • The genotype of the female goat is Aa. Complete the Punnett square and
  9. Specimen, Paper 4, Q3(c)(i) (3 marks): State the genotypes of the people identified as P, Q and R in Fig. 3.3. P Q R [3]
  10. Specimen, Paper 4, Q3(c)(ii) (1 mark): The couple S and T are expecting another child. State the probability that the child will have haemophilia. [1]
  11. Specimen, Paper 4, Q3(c)(iii) (2 marks): Describe what is meant by the term sex-linked characteristic. [2] [Total: 15]

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