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How do little elephants grow up to be BIG elephants?

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Presentation on theme: "How do little elephants grow up to be BIG elephants?"— Presentation transcript:

1 How do little elephants grow up to be BIG elephants?

2 Why do animals shed their skin?

3 Asexual reproduction occurs in a series of stages, or steps.

4 Three reasons why cells reproduce by asexual reproduction: 1. Growth 2
Three reasons why cells reproduce by asexual reproduction: Growth Repair Replacement Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun. Cell that reproduce by asexual reproduction reproduce constantly.

5 Animated Mitosis Cycle
Interphase Prophase Metaphase Anaphase Telophase & Cytokinesis

6 Interphase occurs before mitosis begins
Chromosomes are copied (# doubles) Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANE Nucleus Cytoplasm

7 Interphase Plant Cell Animal Cell
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8 Prophase 1st step in Mitosis
Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite end of the cell. Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers

9 Prophase Plant Cell Animal Cell Spindle fibers Centrioles
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10 Metaphase 2nd step in Mitosis
Chromatids (or pairs of chromosomes) attach to the spindle fibers. Chromatids are then pulled to the middle of the cell Centrioles Spindle fibers

11 Metaphase Plant Cell Animal Cell
Photographs from:

12 Anaphase 3rd step in Mitosis
Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

13 Anaphase Plant Cell Animal Cell
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14 Telophase 4th step in Mitosis
Two new nuclei form. Chromosomes appear as chromatin (threads rather than rods). Mitosis ends. Nuclei Nuclei Chromatin

15 Telophase Plant Cell Animal Cell
Photographs from:

16 Cytokinesis occurs after mitosis
Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

17 Animal Mitosis -- Review
Interphase                                                              Prophase                                                              Metaphase                                                              Anaphase                                                              Telophase                                                             

18 Plant Mitosis -- Review
Interphase                                                              Prophase                                                              Metaphase                                                              Anaphase                                                              Telophase                                                             

19 Cell Cycle

20 - Cell Division The Cell Cycle 20

21 Mitosis Animation


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