This week, our class started learning further information about Mitosis, a subject we had just touched bases on last week in science. Mitosis is the splitting of the nucleus. We started off the week learning about the different kinds of DNA structures and the different kinds of DNA organizations.

We learned that chromatins are unravelled, unorganized DNA. It is kinds of like a ball of yarn.

Next, we learned that chromosomes are wrapped up and very organized DNA. Instead of a ball of yarn, a chromosome is like a neatly and smoothly wrapped spool of yarn, instead of a ball.

During mitosis, DNA replicates. This is when the DNA copies itself and makes double the amount of DNA. There are pre-replication chromatids, which are only one line. There are also post-replication chromatids, which look like X's. They are two of the pre-replication chromatids, connected by a cell plate.

We then learned that during a big chunk of the cell's life, it is in interphase. This phase is also named the resting phase because from the outside, it doesn't look like the cell is doing much. On the contrary, inside the nucleus, the DNA is preparing for mitosis to begin.

We also learned that centrosomes are organized cells.

We also took the following notes:

• How many times the cell goes through the lifecycle differs, depending on the type of cell and it's structure and functions.
• Interphase is part of the lifecycle.
• Most of the cell cycle is interphase.
• Mitosis is the splitting of the nucleus.
• Some scientists say that cytokenesis is part of mitosis, but others beg to differ.
• Cytokenesis is the process of the cytoplasm splitting, hence the cytokenesis.
• Synthesize-Replicate.
• Centrioles- Create the spindle fibers.

The order of phases in mitosis (if we include interphase and cytokenesis):

1. Interphase

2. Prophase

3. Metaphase

4. Anaphase

5. Telophase

6. Cytokenesis

That is what I learned in science this week.