1 1 Asexual Reproduction Mitosis DSQ: Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals?

8 8 Asexual Reproduction Mitosis DSQ: Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals? ANALYZE (break apart, study the pieces) There is a question within a question in this DSQ. Can you identify the question within the DSQ?

 Chromosomes- structures in the nucleus that contain DNA  DNA-deoxyribonucleic acid, is the master copy of an organism’s information code.  Chromatin- hereditary material in a cell’s nucleus, it coils into the form of chromosomes when a cell divides  Centromere-where the double stranded chromosome is held together

How do little elephants grow up to be BIG elephants?

The process of asexual reproduction begins after a sperm fertilizes an egg.

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.

Animated Mitosis Cycle Interphase Prophase Metaphase Anaphase Telophase & Cytokinesis

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

Animal Cell Plant Cell Photographs from:

Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite end of the cell. (Only in animal cells).  Chromosomes become fully visible.  The nuclear membrane disappear Spindle fibers form between the poles.(Only in plants). Centrioles Sister chromatids Spindle fibers

Animal Cell Plant Cell Photographs from: Spindle fibers Centrioles

Chromatids (or pairs of chromosomes) attach to the spindle fibers and line up across the center of the cell. Centrioles Spindle fibers

Animal Cell Plant Cell Photographs from:

Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

Animal Cell Plant Cell Photographs from:

Two new nuclei form. Chromosomes appear as chromatin (threads rather than rods) and become harder to see.  Centrioles and spindle fibers start to disappear.  A nuclear membrane starts to form around each group of chromosomes. Mitosis ends. Nuclei Chromatin

Animal Cell Plant Cell Photographs from:

Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Cytokinesis

I I nterphase P P rophase M M etaphase A A naphase T T elophase C C ytokinesis IPMATC I Pray More At The Church or I Pray More At The Church or I Pee More After Tea “Purple Monkeys Attack Tigers” –Interphase and Cytokinesis are not part of mitosis they are the prep. And final results respectively!

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