Mitosis and meiosis compared

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. Read this first

   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

2. 1.

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

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

3. 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

4. 2.

   Esme reads the card table. What happens to the chromosome number in mitosis?

   • It doubles, n to 2n
   • It stays the same, 2n to 2n
   • It is cut in half, 2n to n
   • It doubles, 2n to 4n

5. 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

6. 3.

   Jun reads that a young animal grows as its body cells divide. Which choice names the process and where it happens?

   • Meiosis, in body cells that divide
   • Mitosis, in body cells that divide
   • Meiosis, in cells that make egg and sperm cells
   • Mitosis, in cells that make egg and sperm cells
7. 4.

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

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

8. 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

9. 5.

   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 halves the chromosome number
   • Meiosis, which makes two cells from one
   • Mitosis, which makes four cells from one
   • Mitosis, which keeps the chromosome number the same
10. 6.

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

    • 1
    • 4
    • 3
    • 2
11. 7.

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

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

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?

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

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

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

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

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