1. Asexual Reproduction
Section 4.2

2. Cell Division Asexual Reproduction
Learning Goal: To learn how cells asexually reproduce through cell division.
Success Criteria:
I know I am succeeding when I can…
recognize cell division as a form of asexual reproduction
identify and describe the stages of cell division
describe the end result of cell division

3. Cell Division
cell division consists of mitosis and cytokinesis— two of the stages of the cell cycle
The Cell Cycle:
Interphase
Mitosis (Prophase, Metaphase, Anaphase & Telephase)
Cytokinesis
Mitosis & Cytokinesis Animation

4. i. Interphase “In Between”
cell grows and carries out its normal function
DNA form a mass of tangled strands called chromatin
DNA is replicated

5. i. Interphase Cont’d…
sister chromatids (each contain exact same genes at the same loci) remain attached by a structure called the centromere
sister chromatids function as a single chromosome

6. ii. Mitosis “Prepare” Prophase first phase of mitosis
sister chromatids begin to shorten and thicken and become chromosomes
centrioles separate and move to opposite poles of the cell
nuclear membrane starts to dissolve
“Prepare”

7. ii. Mitosis Cont’d… “Middle” Metaphase
spindle fibres attach to centromeres of chromosomes
spindle fibres move and align chromosomes in middle of cell

8. ii. Mitosis Cont’d… “Apart” Anaphase
centromeres divide, and sister chromatids move to opposite poles of cell
same number and type of chromosomes will be found at each pole of cell

9. ii. Mitosis Cont’d… “The End” Telephase last phase of mitosis
chromosomes reach opposite poles of cell and begin to unwind
spindle fibres dissolve
nuclear membranes form around chromosomes
result is two daughter nuclei

10. iii. Cytokinesis
“Two”
cytoplasm is divided to form two new identical cells

11. Cell Division Asexual Reproduction
Learning Goal: To learn how cells asexually reproduce through cell division.
Success Criteria:
I know I am succeeding when I can…
recognize cell division as a form of asexual reproduction
identify and describe the stages of cell division
describe the end result of cell division

12. Homework
4.2 questions #3-5