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schung7 schung7
wrote...
12 years ago
Also - how does mitosis differ from meiosis?  I looked in my textbook and it's so confusing.  I just want a brief and concise answer.  Thank you!

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wrote...
Educator
12 years ago
Enjoy this animation Wink Face

https://biology-forums.com/index.php?topic=924.0;highlight=mitosis
RockYou13 Author
wrote...
12 years ago
mitosis occurs all the time in cell, like cell repairing, cell division
meiosis occurs particularly at reproduction cells.
wrote...
12 years ago
Mitosis is, basically, forming a clone of the cell. The two daughter cells are identical, and formed from asexual reproduction. Meiosis, on the other hand, is sexual reproduction. It forms an egg and sperm cell. The resulting cell with be somewhat similar to the parents, but not identical. It ends with 4 cells. In the number of resulting chromosomes, mitosis's results are 2 daughter cells that are diploid (two pairs of chromosomes) and meiosis has haploid cells (only 1 set).
wrote...
12 years ago
Mitosis is cell replication into another identical cell. In humans, who have 46 chromosomes (23 pairs), it's the formation of another cell with the same number of chromosomes; another diploid cell. If you're looking for A level standard understanding, mitosis has 5 stages (interphase, prophase, metaphase, anaphase, telophase). In mitosis, at metaphase 1 chromosomes line up down the centre of the cell, then in anaphase the chromatids get pulled to opposite poles of the cell.

Meiosis is the production of gametes, or haploid cells, for sexual reproduction. In humans, this is the formation of cells with 23 chromosomes from cells with 46. Each cell produces 4 gametes. Then in sexual reproduction, two gametes (one from male one from female) fuse together in fertilisation. In meiosis, there are 9 stages (interphase, prophase 1, metaphase 1, anaphase 1, telophase 1, prophase 2, metaphase 2, anaphase 2, telophase 2.) Metaphase 2 and anaphase 2 are identical to the stages in mitosis, and chromatids get pulled to opposite poles of the cell. However, in metaphase 1, instead of the chromosomes lining up individually down the centre of the cell, they line up in their pairs. In anaphase 1, the chromosomes get pulled to opposite poles of the cell (not the chromatids).

Hope that helps. All A level textbooks or websites will have this in.
terebt Author
wrote...
12 years ago
mitosis is the splitting of cells to make daughter cells, and meiosis is the splitting of sex cells into 4 sperms or ovas and an egg. the sperm and egg each have only 23 chromosomes while the normal body cell has all 46 chromosomes. when the sperm and egg connect, it makes a zygote, which is a baby in the woman's fetus.
moonman Author
wrote...
12 years ago
Mitosis is asexual reproduction (which means it only requires one cell to reproduce) and meiosis is sexual reproduction (which means it needs 2 parent cells to reproduce). They are a means of reproduction for cells.
schung7 Author
wrote...
12 years ago
Thank you so much everyone!!!
wrote...
12 years ago
mitosis is done in diploid cells and creates another diploid (2n, 46 chromosomes) cell.

meiosis creates haploid cells (1n, 23 chromosomes)

Mitosis happens all the time, meiosis is more specialized to sex cells.

My AP Bio teacher taught us to remember them by saying I-PMAT

I-Interphase
P-prophase
M-metaphase
A-anaphase
T- telophase (when cytokinesis occurs)
wrote...
12 years ago
So basically mitosis occurs all the time within cell. This is like cell repairing, or cell division.
Meiosis, on the other hand, occurs in reproduction cells.
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