Genetic terms and monohybrid inheritance

Genetic terms and monohybrid inheritance Quiz

Spec 3.7.1 · AQA A-Level Biology: Quiz

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  1. 1. A plant has genotype TtTt. Which term describes it?

    • A. Homozygous dominant
    • B. Homozygous recessive
    • C. Heterozygous
    • D. Hemizygous

  2. 2. What does a genotype describe?

    • A. The visible characteristics of an organism
    • B. The alleles an organism carries
    • C. The effect of the environment
    • D. The number of chromosomes only

  3. 3. Roan cattle are CRCWC^RC^W. What does this show?

    • A. CRC^R is dominant to CWC^W
    • B. CWC^W is recessive to CRC^R
    • C. The alleles are codominant
    • D. The alleles are on different chromosomes

  4. 4. Two heterozygous parents (AaAa × AaAa), aa recessive. What proportion of offspring show the recessive phenotype?

    • A. 1/4
    • B. 1/2
    • C. 3/4
    • D. 0

  5. 5. Two carriers have two children. What is the probability that both have the recessive disease?

    • A. 1/2
    • B. 1/4
    • C. 1/8
    • D. 1/16

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