To Mrs. Marcil



MITOSIS AND MEIOSIS
Today in Mrs. Marcil's class they were discussing the reproductive processes of Meiosis and Mitosis. However, by the confused looks of the students, Mrs. Marcil knew that they did not understand anything she was saying.


YAYAYAYAY
FIELD TRIP!!!!
"Who wants to go on a field trip?" asked Mrs. Marcil. All of a sudden, every kids' hand in the room shot up.
"All right everyone, let's go to the bus. We are going to explore the two amazing processes of Meiosis and Mitosis." sang Mrs. Marcil.




Prophase
Prophase
Prophase
Prophase
"For Mitosis, we are going into a cut to see how the cells regenerate themselfes to heal the wound." Mrs. Marcil said.
"At my old school we never went inside a person's cut before!" said Cassidy.
"Well this is a different type of classroom where we actually learn" sang Mrs. Marcil.

"All right class here is a general outline of the processes we are going to be observing today. Mitosis begins with a somatic diploid cell. Class, somatic means DNA arranged in chromosomes and diploid means the chromosomes are arranged in pairs," lectured Mrs. Marcil in to the class.




"Interphase is a period of normal cell activities, like cell growth, and if the cell needs to divide, the chromosomes are copied. The first stage is Prophase, where mitosis begins. Here the nuclear envelope breaks down and the centrioles seperate and move to opposite ends of cell, while spindle fibers begin to form," said Mrs. Marcil.





Next in Metaphase, the centromeres of the chromosomes attach to spindle fibers and the chromosomes line up in middle. In Anaphase, the centromeres split and each half the chromosome goes to a side of the cell. Also in Anaphase, the cell membrane starts to pinch off at the center. In Telephase, the last stage of mitosis, the cell membrane moves inward and the cytoplasm splits, which is called cytokines, and a nuclear membrane forms to create two identical daughter cells," lectured Mrs. Marcil.
"So we start with diploid somatic cells, but does anyone know what we end with?" asked Mrs. Marcil.
Only one hand shot up, that belonged to Erin who intelligently said, "They end with diploid cells, who have 46 Chromosomes, whose genes are identical from the parent to the daughter cells, which means the parent cell also has 46 Chromosomes."
"Well done Erin. Gold stars for you today," stated Mrs. Marcil.




2n



2n
2n
Parent Cell
Daughter Cells
"Lets discuss the advantage of Mitosis. The cell uses Mitosis for growth and development. So when you fall, just as Jimmy did, your cells do mitosis to create new cells to replace the damaged ones," said Mrs. Marcil.







Mitosis
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To Mrs. Marcil



MITOSIS AND MEIOSIS
Today in Mrs. Marcil's class they were discussing the reproductive processes of Meiosis and Mitosis. However, by the confused looks of the students, Mrs. Marcil knew that they did not understand anything she was saying.


YAYAYAYAY
FIELD TRIP!!!!
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