MEIOSIS STAGES WORKSHEET
Write the name for each stage below each of the following pictures
Stage: ______________________
Stage: ______________________
Stage: ______________________
Stage: ______________________
Stage: ______________________
Stage: ______________________
Stage: ______________________
Stage: ______________________
COMPLETION Write the stage for each of the following.
1. ______________________________________ chiasmata form allowing for crossing over
2. ______________________________________ pairs of homologs line up in middle of cell between
centrioles
3. ______________________________________ four daughter cells form
4. ______________________________________ independent assortment
5. ______________________________________ two haploid cells with sister chromatids
6. ______________________________________ synapsis occurs
7. ______________________________________ homologous chromosomes segregate and move to
poles
8. ______________________________________ first daughter cells form
9. ______________________________________ kinetochores are present on both sides of each
chromosome
10. ______________________________________ both chromatids of one chromosome are attached to
a kinetochore
11. ______________________________________sister chromatids separate and move to poles
COMPLETION. Use the information below to answer the following questions. Diploid cells from an
organism have 32 chromosomes.
12. The haploid (n) number of the chromosomes is ______________________.
13. Cells from this organism have how many sister chromatids present at the start of meiosis?
__________________________________________
14. How many homologous pairs of chromosomes would be present at the start of meiosis?
____________________________________________
15. If this cell underwent spermatogenesis, each sperm would contain _______________ chromosomes.
SHORT ANSWER
16. Meiosis generates diversity in sex cells through crossing over, mutations made during crossing over,
and __________________________________________________.
17. Write all the stages of Meiosis that are part of the reduction division of meiosis.
18. State whether the following processes occur in males, females, or both.
A. gametogenesis __________________________________________________
B. spermatogenesis_________________________________________________
C. oogenesis_______________________________________________________
D. polar body formation_______________________________________________
19. In humans, spermatogenesis begins at ___________________________________.
20. In humans, primary oocytes are in _________________________________ stage of meiosis at birth.
21. In humans, the first cell division of oogenesis occurs during ________________________.
22. In humans, the second meiotic division does not occur until _________________________ in
oogenesis.
23. Complete the sequence: spermatogonium → primary spermatocyte→ secondary
spermatocyte→_________________________________________→ spermatozoa.
24. How many haploid sperm are produced from one primary spermatocyte? _____________
25. How many polar bodies are produced from one primary oocyte in complete meiosis?
_________________________
26. Write yes or no in the spaces of this table to distinguish meiosis from mitosis.
Meiosis
a. Complete after one division
b. Requires two successive divisions
c.
Homologous chromosomes are duplicated
d. During anaphase I, homologous chromosomes
separate
e. Results in daughter cells with diploid number of
chromosomes
f.
Results in daughter cells with the haploid
number of chromosomes
g. In animals, it is unique to the body cells
h. In animals, it is unique to the sex cells
Mitosis