Meiosis Review Worksheet



Name:_______________________________

Cell division and cancer review

1. What type of cell undergoes meiosis? Gamete cells or Somatic cells

2. Define homologous chromosomes. 2 chromosomes with similar structure

3. For each of the following state if the cell is haploid or diploid.

Sperm cell =haploid Liver cell =diploid Egg cell =haploid Stomach cell =diploid

4. If the diploid number in a liver cell of an organism is 52, how many chromosomes are there in the egg of this organism? 26

5. During meiosis, the chromosome number:

a) is doubled b) is reduced c) remains the same d) becomes diploid

6. Cells starting mitosis & meiosis begin with a (haploid or diploid) set of chromosomes.

diploid

7. How many times do cells divide during meiosis?

twice

8. Draw a tetrad and show crossing over. During what process and in which phase do you first see this in?

During prophase of meiosis

[pic]

9. How many cells form at the end of meiosis and how many chromosomes do they each contain?

4 with 23 chromosomes

10. A sperm cell is a (gamete or zygote), and is (haploid or diploid).

11. Which of the following best describe the term “crossing over”?

a. An exchange of information between two homologous chromosomes

b. A molecular interaction between two sister chromatids

c. A molecular interaction between two non-sister chromatids

d. A separation of two sister chromatids

12. Which letter in Figure 1 represents meiosis? Why?

D, one diploid cell becomes 4 haploid

13. Which letter in Figure 1 represents mitosis? Why?

A, one diploid cell becomes 2 diploid

14. Which letter in Figure 1 represents fertilization? Why?

B, two haploid cells become one diploid

16. What is the ultimate goal/purpose of mitosis?

Growth, repair, replace damaged cells

17. What is the difference between a chromosome, sister chromatids, and homologous chromosomes? You may draw a picture as your answer.

Chromosome-form of DNA when it divides

Sister chromatids- 2 identical chromosomes attached at a centromere

Homologous Chromosomes- 2 chromosomes with the same structure

18. How are DNA and chromosomes related?

Chromosomes are made of DNA

19. What is the difference between a haploid, diploid, and zygote?

Haploid cells have one set of chromosomes, diploid has 2 sets of chromosomes and a zygote is formed when an egg and sperm cell combine

20. Give 3 examples how meiosis differ from mitosis.

1. Meiosis occurs in gametes not somatic cells

2. Meiosis forms 4 haploid cells, not 2 diploid cells

3. Meiosis has 2 divisions not one division

21. If the sperm cell of an organism contains 14 chromosomes, how many chromosomes are in a somatic cell of this organism?

28

22. The two major divisions of the cell cycle are:

Interphase and mitosis

23. Draw the cell cycle and label the parts:

[pic]

24. Describe what happens in each part of interphase:

G1- cell growth

S-DNA replication

G2- cell prepares for mitosis, spindle fibers form

Label the following terms on the diagram below: interphase, prophase, metaphase, anaphase, telophase, sister chromatids, centrioles, nucleolus, spindle fibers, chromatin, cleavage furrow, nuclear membrane, cell membrane, chromosome

See class notes or text book

[pic]

25. Cancer is _uncontrolled cell growth___________________________________.

26. Cancer is caused by____cell regulators not functioning properly___________________.

27. Define benign

A tumor that does not spread

28. Define malignant

A tumor that develops and spreads

29. Define metastasis

When a tumor spreads to another part of the body.

30. What are cyclins and what do they do?

Cyclins are proteins which control the rate of the cell cycle

31. Name 3 types of non-disjunction and describe them.

Trisomy 21

Klinfelters

Turner’s Syndrome

-----------------------

Figure 1

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download