meiosis

1. Ch. 4.1
Meiosis vs.
Mitosis

2. Focus Questions
1. How do meiosis and mitosis differ?

3. 1. How do meiosis & mitosis differ?
There are four phases of meiosis I.

4. 1. How do meiosis & mitosis differ?
There are four phases of meiosis II.

5. Normal human cell:
23 paired
chromosomes
After duplicating:
46 paired
chromosomes

6. Haploid (egg cell):
23 individual
chromosomes
Haploid (sperm cell):
23 individual
chromosomes

7. Mitosis Review

8. During what phase do the chromosomes line up in
the middle of the cell?
0 0 0 0
a. b. c. d.
a. Prophase
b. Metaphase
c. Anaphase
d. Telophase
45

9. During what phase does the DNA condense into
chromosomes and the nuclear membrane
disappear?
0 0 0 0
a. b. c. d.
a. Telophase
b. Prophase
c. Anaphase
d. Metaphase
45

10. During telophase, two identical __________
form.
0 0 0 0
a. b. c. d.
a. Centrioles
b. Chromosomes
c. Nuclei
d. Spindle fibers
45

11. When does the cell actually split into 2
separate daughter cells?
A. Prophase
B. Anaphase
C. Telophase
D. Metaphase
E. Interphase
F. Cytokinesis
45
Prophase
0 0 0 0 0 0
Anaphase
Telophase
Metaphase
Interphase
Cytokinesis

12. When does the cell grow & develop?
A. Prophase
B. Anaphase
C. Interphase
D. Metaphase
E. Telophase
45
Prophase
0 0 0 0 0
Anaphase
Interphase
Metaphase
Telophase

13. 1. How do mitosis and meiosis differ?
Meiosis Both Mitosis

15. 1. How do mitosis and meiosis differ?
Meiosis Both Mitosis
- Reproductive cells
- Start with diploid cell
- Nucleus divides 2x
-Cell division: cell &
nucleus divide
- results in 4 haploid cells
- DNA replicates & is
- importance: forms egg
passed on
& sperm cells
-Body cells
- nucleus divides 1x
- results in 2 diploid cells
(identical)
- importance: growth,
repair, reproduction
(single-celled)

16. How many cells result from the mitotic phase
(mitosis & cytokinesis)?
A. 1
B. 2
C. 3
D. 4
45
0 0 0 0
1
2
3
4

17. How many cells result from meiosis?
A. 1
B. 2
C. 3
D. 4
45
0 0 0 0
1
2
3
4

18. What is the name for a cell that has only half of
the chromosomes?
A. chromatid
B. diploid
C. haploid
D. homologue
chromatid
45
0 0 0 0
diploid
haploid
homologue

19. Why type of cells go through meiosis?
A. Body cells
B. Brain cells
C. Haploid cells
D. Reproductive cells
Body cells
45
0 0 0 0
Brain cells
Haploid cells
Reproductive cells

20. During meiosis, when do homologous
chromosomes split up into 2 cells?
A. Interphase
B. Meiosis I
C. Telophase II
D. Meiosis II
Interphase
45
0 0 0 0
Meiosis I
Telophase II
Meiosis II

21. In which cell division is the end result 4 haploid
daughter cells?
A. Interphase
B. Mitosis
C. Meiosis I
D. Meiosis II
Interphase
45
0 0 0 0
Mitosis
Meiosis I
Meiosis II