Cells and Chromosomes

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Cells and Chromosomes

Tin Tin Su

University of Colorado

Meads Elementary school visit

Feb 22, 2010

uhaweb.hartford.edu/ BUGL/RBCs.jpg

All living things are made of cells

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Nathan Sawaya

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missinglink.ucsf.edu

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uhaweb.hartford.edu/ BUGL/RBCs.jpgLike blue Lego Man is made oflots of little blue Lego pieces

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www.microview.org.uk

plants are made of plant cells

dogs are made of dog cells

publications.nigms.nih.gov

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www.justusdogs.com.au

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Fruit flies are made of fruit fly cells

bio.research.ucsc.edu/people/sullivan/

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iml.jou.ufl.edu

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If you look inside each cell, you will find

http://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Drosophila_metaphase_chromosomes.jpg/800px-Drosophila_metaphase_chromosomes.jpg

Cells in female flies have 2 X chromosomesCells in male flies have one X and one Y

(plus a lot of other chromosomes)public.bay.livefilestore.com

Fly pictures from: course1.winona.edu

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Mr. Thomas Morgan studied a white eye fruit fly.It was a male. He figured out that it had white eyes because it had a different X chromosome.

X chromosomeen.wikipedia.org

Chromosomes carry instructions for what cells in your body make or do (like your eye color or proteins to fight off germs)

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www.genome.gov

When you grow, you need to make more cells

How to make more cells:Take a cell, copy everything in it, split into two

copy Line up

split

When you grow, you need to make more cells

How to make more cells:Take a cell, copy everything in it, split into two

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Make sure each cell gets a set of chromosomes

From Foley and Sprenger, 2001

Little protein machines push and pull chromosome copies

When things go wrong…..

When cells lose chromosomes, they lose information, and can cause diseases like cancer

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dms.dartmouth.edu

Become a scientist, so you canfigure out what goes wrong and fix it!

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For now, take care of your cells….

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Eat wellExerciseSleep to get restDon’t smokeWear sun-screen