S-7-4-3_Drawing Meiosis Presentation

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Presentation transcript:

S-7-4-3_Drawing Meiosis Presentation

Meiosis Reduces the number of chromosomes by half in new cells Meiosis Reduces the number of chromosomes by half in new cells. Produces genetically different offspring cells.

Directions Showing 4 sample chromosomes. USE THE FOLLOWING COLORS TO CREATE YOUR DRAWINGS IN YOUR DRAWING PACKETS Red = 1 (big, from father), Orange = 1 (big, from mother), Light blue = 2 (small, from father), Dark blue = 2 (small, from mother) Showing 4 sample chromosomes. A real human cell would have 46 chromosomes.

Interphase Similar to mitosis

Meiosis I Prophase I Notes MEIOSIS - Occurs in ovaries/testes to make egg/sperm cells Prophase I Notes Similar to mitosis except the  same sized chromosomes pair up with one another.

Meiosis I Metaphase I Notes Same size chromosomes line up as pairs.

Meiosis I Anaphase I Notes Chromosome pairs split apart.

Meiosis I Telophase I Notes Chromosomes unwind. New nuclei.

Meiosis I Cytokinesis Notes Cell membrane splits into 2. Occurs after meiosis I.

This is only the end of the first cycle, continue on to meiosis II.

Meiosis II Prophase II Notes Chromosomes pair up with one another in each cell.

Meiosis II Metaphase II Notes Individual chromosomes line up.

Meiosis II Anaphase II Notes Chromosomes split.

Meiosis II Telophase II Notes Chromosomes unwind. New nuclei

Meiosis II Cytokinesis Notes 2 23 4 Showing ___ sample chromosomes in each cell.   Real human cell would have ___ chromosomes in each cell. One cell becomes ____ cells. 23 4

Meiosis II There are half as many. What happened to the final number of chromosomes in each cell compared to the beginning? There are half as many.

Meiosis I Diagram Source: http://www.biology.iupui.edu/biocourses/n100/images/meiosis1cropped.jpg

Meiosis 2 Diagram Source: http://www.biology.iupui.edu/biocourses/n100/images/meiosis2cropped.jpg