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This week we learned about cell reproduction and mitosis.

Cell reproduction:

• Makes more organelles



• Replicates DNA



• Cells must grow before and after the cell splits

*If you kept splitting a cell, there wouldn't be enough organelles and DNA for new cells. If you split and cell, gave it time to grow, then split it again there would me enough organelles and DNA to make new cells.

We also learned about Mitosis- the process by which the eukariotic cell separates the chromosomes in its cell nucleus into two identical sets in the nucleus. The term "Mitosis" means nuclear cell division. There are four phrases in Mitosis.

Prophase: When the chromosomes begin to condense into a tight ball.

Metaphase: When the chromosomes, of the dividing cell,begin to line up with the spindle aparatus ( the structure that seperates the chromosomes into the daughter cells).

Anaphase: The spindle aparatus pulls two identical sets of chromosomes apart from one another. Each new set of chromosomes is moved to the opposite side of the spindle aparatus.

Telophase: The chromosomes move toward the opposite ends of the spindle aparatus.

We also did an "Onion Root Cell" lab. We took slides with onion root cells on them and looked at them under a microscope. Some of them looked like this.