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4.20 Genetic terms
Exam question
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State the meaning of each term: genotype, phenotype, homozygous, heterozygous.
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Total for this question: 4 marks
4.20 Genetic terms
Exam question
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Which genotype is heterozygous?
(1)Total for this question: 1 mark
4.20 Genetic terms
Exam question
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What is a phenotype?
(1)Total for this question: 1 mark
4.20 Genetic terms
Exam question
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Explain why two plants with the same phenotype can have different genotypes.
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Total for this question: 2 marks
4.20 Genetic terms
Exam question
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Explain why plants with the same genotype may have different phenotypes.
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Total for this question: 2 marks
4.20 Genetic terms
Exam question
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In pea plants, tall (T) is dominant to short (t). Identify the phenotype of TT and tt.
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Total for this question: 2 marks
4.20 Genetic terms
Exam question
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Suggest how to find out whether a tall pea plant is TT or Tt.
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Total for this question: 2 marks
4.20 Genetic terms
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State the meaning of the term recessive.
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Total for this question: 1 mark
4.20 Genetic terms
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Explain why a person with genotype ff has cystic fibrosis.
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Total for this question: 2 marks
4.20 Genetic terms
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Give the possible genotypes of a person with the dominant phenotype for a gene with alleles B and b.
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Total for this question: 2 marks
4.20 Genetic terms
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What is the genotype of a person homozygous recessive for allele h?
(1)Total for this question: 1 mark
4.20 Genetic terms
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Explain why carriers of a recessive disease are always heterozygous.
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Total for this question: 2 marks
4.20 Genetic terms
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Describe the difference between a characteristic controlled by genotype and one affected by environment.
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Total for this question: 2 marks
4.20 Genetic terms
Exam question
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Identify which of these are genotypes: Bb, blue eyes, tt, tall.
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Total for this question: 2 marks
4.20 Genetic terms
Exam question
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Explain why the term "homozygous dominant" describes a pure-breeding tall plant.
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Total for this question: 2 marks
