1. 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
Why do we resemble our parents? (We resemble our parents because we inherit traits from them.) 2. Why does asexual reproduction result in genetic clones? (During asexual reproduction, the organism makes a copy of itself without combining its genes with those from another organism. The offspring are a genetic copy of the single parent.) 3. Why are the offspring of sexual reproduction not genetically identical to either parent? (During sexual reproduction, genes from two individuals combine to produce offspring with new combinations of genes.)

2. 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
Why do we resemble our parents? (We resemble our parents because we inherit traits from them.) 2. Why does asexual reproduction result in genetic clones? (During asexual reproduction, the organism makes a copy of itself without combining its genes with those from another organism. The offspring are a genetic copy of the single parent.) 3. Why are the offspring of sexual reproduction not genetically identical to either parent? (During sexual reproduction, genes from two individuals combine to produce offspring with new combinations of genes.)

3. i. Interphase “In Between”
cell grows and carries out its normal function
chromosomes form a mass of tangled strands called chromatin
chromosomes are replicated
Why do we resemble our parents? (We resemble our parents because we inherit traits from them.) 2. Why does asexual reproduction result in genetic clones? (During asexual reproduction, the organism makes a copy of itself without combining its genes with those from another organism. The offspring are a genetic copy of the single parent.) 3. Why are the offspring of sexual reproduction not genetically identical to either parent? (During sexual reproduction, genes from two individuals combine to produce offspring with new combinations of genes.)

4. i. Interphase Cont’d…
sister chromatids (each containing exactly the same genes at the same loci) remain attached by a structure called the centromere
sister chromatids function as a single chromosome
Why do we resemble our parents? (We resemble our parents because we inherit traits from them.) 2. Why does asexual reproduction result in genetic clones? (During asexual reproduction, the organism makes a copy of itself without combining its genes with those from another organism. The offspring are a genetic copy of the single parent.) 3. Why are the offspring of sexual reproduction not genetically identical to either parent? (During sexual reproduction, genes from two individuals combine to produce offspring with new combinations of genes.)

5. ii. Mitosis “Prepare” Prophase first phase of mitosis
chromosomes begin to shorten and thicken and become visible under a microscope
centrioles separate and move to opposite poles of the cell
nuclear membrane starts to dissolve
“Prepare”
Centrioles are involved in the formation and organization of spindle fibres, which attach to the chromosomes during cell division. The centromere helps anchor the chromosomes to the spindle fibres

6. ii. Mitosis Cont’d… “Middle” Metaphase
the spindle fibres attach to the centromeres of the chromosomes
spindle fibres move and align the chromosomes in middle, or equator, of the cell
Centrioles are involved in the formation and organization of spindle fibres, which attach to the chromosomes during cell division. The centromere helps anchor the chromosomes to the spindle fibres

7. ii. Mitosis Cont’d… “Apart” Anaphase
the centromeres divide, and the sister chromatids move to opposite poles of the cell
the same number and type of chromosomes will be found at each pole of the cell
Centrioles are involved in the formation and organization of spindle fibres, which attach to the chromosomes during cell division. The centromere helps anchor the chromosomes to the spindle fibres

8. ii. Mitosis Cont’d… “The End” Telephase last phase of mitosis
chromosomes reach the opposite poles of the cell and begin to unwind
spindle fibres dissolve
nuclear membranes form around the chromosomes
result is two daughter nuclei
Centrioles are involved in the formation and organization of spindle fibres, which attach to the chromosomes during cell division. The centromere helps anchor the chromosomes to the spindle fibres

9. iii. Cytokinesis “Two” cytoplasm is divided to form two new cells
Centrioles are involved in the formation and organization of spindle fibres, which attach to the chromosomes during cell division. The centromere helps anchor the chromosomes to the spindle fibres

10. Homework
4.2 questions #3-5
Centrioles are involved in the formation and organization of spindle fibres, which attach to the chromosomes during cell division. The centromere helps anchor the chromosomes to the spindle fibres