Genetic variation from meiosis and fertilisation

Genetic variation from meiosis and fertilisation Quiz

Spec 3.4.3 · AQA A-Level Biology: Quiz

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  1. 1. A species has n=6n = 6 pairs of chromosomes. How many gamete combinations are possible without crossing over?

    • A. 12
    • B. 36
    • C. 64
    • D. 720

  2. 2. Which process involves the exchange of alleles between non-sister chromatids?

    • A. Independent segregation
    • B. Crossing over
    • C. Random fertilisation
    • D. DNA replication

  3. 3. A species has n=3n = 3. How many chromosome combinations are possible in a zygote, ignoring crossing over?

    • A. 8
    • B. 16
    • C. 64
    • D. 6

  4. 4. Which statement describes random fertilisation?

    • A. Gametes from the same parent always fuse
    • B. Any male gamete can fuse with any female gamete
    • C. Chromatids separate randomly
    • D. Alleles are swapped between chromatids

  5. 5. Which statement about independent segregation is correct?

    • A. It exchanges alleles between non-sister chromatids
    • B. It produces gametes with different mixtures of maternal and paternal chromosomes
    • C. It only happens in mitosis
    • D. It produces identical gametes

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