Thursday, November 8, 2012

Wednesday, November 7, 2012

Guys, sometimes our cells don't do things correctly. this can result in things like down syndrome and cancer. today i'm going to explain cancer to you so you understand how people get it!
Cancer is a general term for a lot of different diseases and you get cancer when your cells grow uncontrollably and they become more powerful. cancer cells are usually spread through the bloodstream to other parts of the body.  This is why people go through radiation and chemo to treat cancer- the radiation kills the cancer cells, but it also kills other cells which is why people get really weak and loose their hair. a type of cancer is thyroid cancer, which is in your throat.  my grandpa had it, but thankfully it isn't a very aggressive form of cancer so he only had a few months of chemo treatment. chemo works sometimes, but other times when the cancer is really strong, chemo isn't affective. sometimes when the cancer is strong, you have to undergo surgery so the doctors can try to cut out the cancer cells. this only happens when the cancer is far along and is very strong. otherwise, most people go through chemo treatments. i hope you all understand how cancer works and understand why it is so powerful now!
cell ya later!
here are some great Mitosis/ Meiosis songs or videos! :D
http://www.youtube.com/watch?v=TMtkursLQ4w
http://www.youtube.com/watch?v=iCL6d0OwKt8

GUYS MEIOSIS. OMG OMG OMG. THIS IS HOW WE WERE CREATED. HOW COOL IS THAT!?!?!?! :D
ALRIGHT ALRIGHT ILL CALM DOWN NOW.
Alright! So just like Mitosis it goes through P.M.A.T. BUT there 
is MORE! :D Ok you start out in Prophase 1 where the spindle fiber begin to form! BUT THERE IS MORE TO PROPHASE The pair of chromosomes in a sense ‘swap’ and this is called crossing over!---------------------------------------------------------->
2nd Metaphase 1 the chromosomes pair up and line up along the equator------------------------------------------------------>
3rd is ANAPHASE where the spindle fibers pull the chromosomes to opposite poles!
 But then finally is Telophase 1! Where the nuclear membrane forms!!
 BUT THERE IS MORE! Because Meiosis form 4 daughter cells it has to go through the process again! but this time it is a bit different!!
Prophase 2 which is the same as regular prophase the spindle fibers are forming

 Then metaphase! this is where it starts to change the chromosomes line up along the equator again! BUT THIS TIME. they don't have a pair!!
THEN it is Anaphase 2! The chromosomes are pulled apart to opposite poles!


FINALLY it is telophase 2! The 2 new cells form nuclear membranes and then there are 4 daughter cells :D








ALSO. unlike Mitosis all 4 daughter cells are UNIQUE. :D