This week for science I'm waiting on a new book. The one for third grade is way to easy for me. So Dad is teaching me about different types of cell replications. The first one we learned about is Mitosis! In Mitosis there are a whole bunches of phases. There's Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cyto-kinesis. I want to tell you what happens in all the different phases. But that would take WAY too long. So I'm going to pick my favorite phase and tell you all about it. If you write back and ask questions about the other phases I'll tell you what happens there too.
My favorite part of Mitosis is actually not considered part of Mitosis. I like Cyto-kenesis the best. I like it because after the new nuclear envelope has formed and all the chromosomes are turning back into chromotin, the cell is pulled apart into two daughter-cells, that are EXACT COPIES! I also like this because the name makes sense after my study of Physics. Kenesis comes from the same word we use for Kenetic Engergy. So it makes sense because the cell is actually moving during this phase.
If I had to choose a different phase as a favorite where something was actually happening to the DNA, I would choose PROPHASE. I like Prophase because the nuclear envelope actually blows up in this phase.
So Dad and I got to watch this amazing video on youtube about Mitosis. I'm going to share it as a link and hope you all can watch it. It's great.
http://www.youtube.com/watch?v=VGV3fv-uZYI
6 comments:
This is a great explanation! Can you tell me what happens in telophase?
This is a great explanation! Can you tell me what happens in telophase?
What a nice piece you've written here! It is very clear.
Sometimes the daughter cells are not identical after mitosis. Try looking up asymmetric cell division (though it can be confusing).
I heard that you have some extra time in your science curriculum. I would recommend reading about Marie Curie (I have an excellent biography I can recommend written by her daughter Eve).
Also try listening to a radiolab episode (especially the early ones). They are better than any science book I've met. Even better if listened to on headphones because the episodes are in stereo.
Radiolab is awesome! Check it out! Let us know what you listen to and what you thought about it. They have short episodes (20 min) and long ones (1 hour). The sound effects are really cool.
So Grandma, what happens in Telophase is that the sister chromotids were pulled apart in Anaphase. They are pulled by the spindle fibers toward to poles of the cell created by the centrosomes. At this stage the nuclear envelopes form around the chromosomes as they unwind back into chromotin. Also Cyto-Kenesis has started and you can see the furrows starting.
That's a very clear explanation. Thank you.
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