meiosis and mitosis

This week we started to learn about meiosis. Its a 11 step process and makes four (tetra) animal cells. The phases/ steps are:

1. diploid cell (2N)
2. prophase I
3. metaphase I
4. anaphase I
5. telophase I
6. prophase II
7. metaphase II
8. anaphase II
9. telophase II
10. gamete (1N)
11. material paternal

Also in meiosis four cells are being made instead of just one, like in mitosis. Also both mitosis and meiosis have overall the same phases, except for meiosis has it has double the phases like prophase I and prophase II. Meiosis also creates animal cells as appose to mitosis which makes any type of cell. Lastly, Meiosis has two adde phases called diploid cell (2N) which occurs at the begining of the cycle and gamete which takes place at the end of meiosis.

cell reproduction

This week we learned about asexual reproduction. The following steps are in order in which they occur in the cell reproduction cycle.

• The cell has to be in a safe enviornment, and if not the cell will continue to rest.
• If the enviornment has been noticed as safe to the cell than the cell will continue to grow and produce.
• The cell starts to copy and unwrap DNA until there is two.
• After the copy the cell continues to grow.
• Along with th safe enviornmet copied DNA, and the cell is big enough the cell will continue to grow.
• DNA enters cell and the cromatid pair separate to create an equal new cell nucleous.

mighty mitosis

We learned about mitosis this week. During mitosis the nucleous cell divides. There are four steps in mitosis called prophase, metaphase, anaphase, and telophase. During each of these steps, they all lead up to a new nucleous at each end of the cell. Also there is another step called interphase, and during this step the chromosomes spread out in the nuclous. During prophase, chromatin coils up and folds the strands of genetic material. The cromatid pair forms an x- shape and each half of the x shape has the same genetic information. During metaphase, the chromatid x's line up in the cell. During anaphase the two halves of the x- separarate from eachother and the cromosomes move apart to each opposite end of the cell. Lastly, during telophase a new nuclear membrane forms around each set of chromosomes. This results of a new nucleous at each end of the cell.