HAPPY GROUNDHOG'S DAY!!!!!!! =)
Yo peoplez how goes it?
okay Wooooo this week we got into another section Meiosis. Yay? This is going to be awkward but whatever. It's science right?
Monday: We switched seats woooooo... Then I talked about SNOW PEOPLEZ!!!! (LAURA MAXWELL'S AWESOME NEW OBSESSION???!!! =)) SNOW PEOPLEZ RULE!! ORANGES ROCK OUT LOUD!!!!
Back to work... On Monday we also took notes about how mitosis cells are diploid= 100% DNA, exactly the same
Meiosis cells are Haploid= 50% DNA, with variation.
Then we had an understanding Mitosis WS for H.W.
Tuesday: we talked more about the purpose of sexual reproduction which is to make haploid cells.
Sexual Reproduction=Meiosis= making sex cells (pollen, egg, sperm)
We came up with an Hypothesis, which we later found out was wrong so I'm not going to put it up since it was well... wrong.
Okay we also went over our ws. I was a little confused on this so I'm pretty sure I wrote something wrong. Anyway it was about Kelly and Alix having an argument. Kelly says:
At the end of Mitosis, the chromosome are pulled apart by the spindle fibers and eventually become two cells due two cytokinesis. Doesn't this mean they are Haploid cells?
We basically had to sum up what we learned and explain why she was wrong.
Wednesday/Thursday (I'm going to combine the two cause the kinda go together=)): We continued where we left off: homologous pairs separated only in meiosis. In mitosis the chromosomes are lined up across the metaphase plate, in meiosis they are on either side of the plate.
Mitosis:
-XXXXX-
Meiosis:
XXXXX
--------- (metaphase plate)
XXXXX
A homologous pair- a pair of chromosomes like you see on a karyotype.
A human has 23 homologous pairs or 46 chromosomes.
Mitosis metaphase: Chromatids split
Meiosis metaphase: Chromosomes split.
We also did a marker cap exercise about homologous pairs. ( I kinda forget it sorry =))
For H.W. we had to correct our hypothesis about meiosis.
(Ignore the dashes, my computer would let me set it up the way I wanted without them =))
-----------------------------------Hypothesis:
----------------------------------( One Cell)
---------------------------------1-------------- 2
Telophase: -------------------->l >l ---------->l >l
-----------------------------------------4
--------------------------------( 2 seprate cells)
-------------------------------1- 2 -------------1 -2
Prophase 2:------------------ >l >l------------ >l >l
-----------------------------------(four cells)
------------------------------1-2------1-2 ----1-2 ----1-2
Telophase 2: -----------------ll --------ll------- ll -------ll
Friday: We did a ws on"Investigating meiosis" that was HW if you didn't finish.
Here's the site: http://www.cellsalive.com/mitosis.htm
And that's our week!!!! =)
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