Mitosis and meiosis compared

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. Read this first

   Cell division counts for an animal, usual case (facts from OpenStax Biology 2e)

   process	divisions	cells made	chromosome number
   mitosis	1	2	2n to 2n
   meiosis	2	4	2n to n

2. 1.

   Ari reads the card table. Which choice says what one round of mitosis makes from one starting cell?

   • 4 cells, after 2 divisions
   • 4 cells, after 1 division
   • 2 cells, after 1 division
   • 1 cell, after 1 division

3. Cell division jobs for an animal (facts from OpenStax Biology 2e)

   process	daughter cells	where it happens	purpose
   mitosis	identical	body cells that divide	growth and repair
   meiosis	different from each other	cells that make egg and sperm cells	making egg and sperm cells

4. 2.

   Bo reads the card table. Which choice describes the daughter cells made by mitosis?

   • Identical to each other, with half the chromosomes
   • Different from each other, with a new mix of chromosomes
   • Different from the parent cell but identical to each other
   • Identical to each other and to the parent cell
5. 3.

   Kira reads the card table. Which job does meiosis do in an animal?

   • Repairs body tissue by copying cells
   • Makes new body cells so the animal can grow
   • Makes egg and sperm cells that copy the body cell exactly
   • Makes egg and sperm cells with half the chromosomes

6. Cell division counts for an animal, usual case (facts from OpenStax Biology 2e)

   process	divisions	cells made	chromosome number
   mitosis	1	2	2n to 2n
   meiosis	2	4	2n to n

7. 4.

   Luz reads a card: two divisions in a row, four cells. Which choice names the process and what happens to its chromosome number?

   • Meiosis, which makes two cells from one
   • Mitosis, which keeps the chromosome number the same
   • Mitosis, which makes four cells from one
   • Meiosis, which halves the chromosome number
8. 5.

   Milo fills the blank on the card table. How many divisions does meiosis take?

   • 1
   • 3
   • 2
   • 4
9. 6.

   Noah fills the blank on the card table. What belongs in the chromosome number box for mitosis?

   • n to 2n
   • n to n
   • 2n to 2n
   • 2n to n

10. Cell division jobs for an animal (facts from OpenStax Biology 2e)

    process	daughter cells	where it happens	purpose
    mitosis	identical	body cells that divide	growth and repair
    meiosis	different from each other	cells that make egg and sperm cells	?

11. 7.

    Pia fills the blank on the card table. What belongs in the purpose box for meiosis?

    • Joining an egg cell to a sperm cell
    • Growth and repair of body tissue
    • Making identical copies of body cells
    • Making egg and sperm cells

12. Use this

    Two ways to reproduce (facts from OpenStax Biology 2e), 2 rows. Columns: way, starting cells, how offspring begin, offspring. asexual, such as budding yeast, 1 parent, a bud forms and the nucleus divides by mitosis, match the parent. sexual, usually 2 parents, an egg cell and a sperm cell join, differ from each other and from the parents.

13. 8.

    Ren reads that a yeast cell forms a bud that pinches off. Which choice names the reproduction and the division used?

    • Asexual, using meiosis
    • Sexual, using mitosis
    • Asexual, using mitosis
    • Sexual, because a new cell forms
14. 9.

    Tala sees a strawberry plant grow a runner with a new plant at a node. How did the new plant begin?

    • From mitosis, with a new mix of chromosomes
    • From the parent's cells dividing by meiosis
    • From the parent's cells dividing by mitosis
    • From an egg cell and a sperm cell joining
15. 10.

    Zee reads that an animal's egg cell and sperm cell join to start a new organism. Which choice names this reproduction?

    • Asexual, because meiosis made the cells that joined
    • Asexual, because one parent is needed
    • Sexual, because mitosis made both cells
    • Sexual, because two cells join