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Count chromosomes after mitosis, meiosis and fertilisation

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-LS1-4, NGSS.HS-LS3-2 · England: GCSE Combined Science: Inheritance, variation and evolution, GCSE Combined Science: Cell biology

Name

Date

Score/ 16

  1. Question 1

    A body cell of a human has 46 chromosomes. It divides by mitosis. How many chromosomes are in each new cell?

    Answer

  2. Question 2

    Which type of division makes egg and sperm cells?

    • A. meiosis
    • B. fertilisation
    • C. mitosis
    • D. binary fission

  3. Question 3

    A chimpanzee sperm cell has 24 chromosomes. It fertilises an egg cell from the same species. How many chromosomes does the zygote (fertilised egg) have?

    Answer

  4. Question 4

    A body cell of a dog has 78 chromosomes. How many chromosomes are in one of its gametes (sex cells)?

    Answer

  5. Question 5

    How many cells are produced when one cell divides by mitosis?

    • A. 4, genetically different
    • B. 2, genetically identical
    • C. 2, genetically different
    • D. 4, genetically identical

  6. Question 6

    A fruit fly sperm cell has 4 chromosomes. It fertilises an egg cell from the same species. How many chromosomes does the zygote (fertilised egg) have?

    Answer

  7. Question 7

    A body cell of a dog has 78 chromosomes. How many chromosomes are in one of its gametes (sex cells)?

    Answer

  8. Question 8

    Which type of division makes egg and sperm cells?

    • A. meiosis
    • B. mitosis
    • C. binary fission
    • D. fertilisation

  9. Question 9

    A onion plant sperm cell has 8 chromosomes. It fertilises an egg cell from the same species. How many chromosomes does the zygote (fertilised egg) have?

    Answer

  10. Question 10

    A body cell of a onion plant has 16 chromosomes. It divides by mitosis. How many chromosomes are in each new cell?

    Answer

  11. Question 11

    How many cells are produced when one cell divides by meiosis?

    • A. 2, genetically identical
    • B. 4, genetically identical
    • C. 4, genetically different
    • D. 2, genetically different

  12. Question 12

    A horse sperm cell has 32 chromosomes. It fertilises an egg cell from the same species. How many chromosomes does the zygote (fertilised egg) have?

    Answer

  13. Question 13

    A body cell of a human has 46 chromosomes. It divides by mitosis. How many chromosomes are in each new cell?

    Answer

  14. Question 14

    Which type of division makes the cells for growth and repair of skin?

    • A. meiosis
    • B. binary fission
    • C. fertilisation
    • D. mitosis

  15. Question 15

    A human sperm cell has 23 chromosomes. It fertilises an egg cell from the same species. How many chromosomes does the zygote (fertilised egg) have?

    Answer

  16. Question 16

    A body cell of a onion plant has 16 chromosomes. It divides by mitosis. How many chromosomes are in each new cell?

    Answer

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Answer key: Count chromosomes after mitosis, meiosis and fertilisation

  1. 1. 46

  2. 2. A. meiosis

  3. 3. 48

  4. 4. 39

  5. 5. B. 2, genetically identical

  6. 6. 8

  7. 7. 39

  8. 8. A. meiosis

  9. 9. 16

  10. 10. 16

  11. 11. C. 4, genetically different

  12. 12. 64

  13. 13. 46

  14. 14. D. mitosis

  15. 15. 46

  16. 16. 16