COLEGIO BRITANICO DE MONTERIA M.S. S.A.S.
Science worksheet.
Sixth grade
Second term
Mg. Karen Paola Sarmiento Aguilera
Score:
Date:
NAME: _____________________________________________________________
 Complete the sentences.
1. Single-celled organisms can reproduce by _________________.
2. The function of cell division is ___________________________________.
3. In _________________, cell division can help repair injured areas.
4. Mitosis produces two cells that are _________________.
5. The offspring of sexual reproduction _________________of both parents.
6. During _________________, two cells combine to form a new organism.
7. Sex cells are produced by _________________.
8. Sex cells have half the normal number of _________________.
9. _________________ requires only one parent.
10. Most animals reproduce by _________________.
 Organisms have a set number of chromosomes. For example, humans have
46 chromosomes in body cells and half that number (23) in sex cells. In the
table below, fill the number of chromosomes for different organisms.
Organism
Human
Full set of chromosomes Half set of chromosomes.
46
23
11. Fruit fly
4
12. Chicken
39
13. Salamander
24
14. Potato
48
 Fill in the blanks with the term that best completes the following sentences.
15. _________________________ provides the information for cell growth and
function.
16. The cell spends most of its time in the _________________________ stage of
the cell cycle.
17. After _________________________, the nucleus of the parent cell has divided
into two new nuclei.
18. A _________________________ is the condensed, visible form of chromatin.
 Use the table below to draw a picture for each step of the cell cycle.
Step
Drawing
Step
Drawing
19.
22.
Interphase
Mitosis:
Anaphase
20.
Mitosis:
Prophase
23.
Mitosis:
Telophase
21.
Mitosis:
Metaphase
24.
Cytokinesis
 Describe what happens in each of mitosis stages.
 Make a diagram that shows meiosis, its stages and describe what is
happening in each one.
25. What would happen if mitosis doesn’t occur?
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26. What would happen if meiosis doesn’t occur?
___________________________________________________________________________
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22. Use the table below, compare meiosis and mitosis.
Characteristic
Meiosis
Number of nuclear divisions
Mitosis
Number of cells produced
Number of chromosomes in
new cells (diploid or haploid)
Type of cell produced
(body cell or sex cell)
Steps of the process
 List different kinds of asexual reproduction, make an illustration of each one.