Can someone explain meiosis?

I'm doing As biology, and learning about meiosis at the moment.
here's my explanation of meiosis at the moment.

1st division.
- chromosomes and centriole duplicate.
(Early prophase)

- chromosomes line up, and spindal begins to form
(Late prophase)

- Chromosome pairs up at the equator.
(Metaphase)

- Spindal pulls chromosome apart
(Anaphase


- Cell membrane constricts
Telaphase.

Is this correct?
Also can someone in very simple English, explain the 2nd division of meiosis.

Please and thank yoy

x

Nearly so. You have grasped the main concept, but quite simplistically. There are events, such as the formation of the synaptonemal complex and subsequent crossing over, which are an integral part of prophase 1. Also, the prophase 1 is further subdivided into LZPDD--Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis, but I don't think you need to know about that. Just remember that crossing over and reduction division take place during MEIOSIS one, in which 2n-->n no of chromosomes in daughter cells.

The 2nd division of meiosis is nothing worth understanding. If you have studied mitosis, then the major events that take place during meiosis 2 are almost similar to mitosis. There is no reduction division here i.e. 2 parent cells with n chromosomes produce 4 daughter cells with "n" chromosomes again, so no reduction division takes place here.

I think that is all about it. Do tell me if you want more details.

Am i being an idiot, or did OP say meiosis, mitosis is what has been explained.
Meiosis involves independent segregation and crossing over right? Or are the two processes almost identical.

I read this and was worried AS biology has failed me!

You read my comment or read the OP?

Am i being an idiot, or did OP say meiosis, mitosis is what has been explained.
Meiosis involves independent segregation and crossing over right? Or are the two processes almost identical.

Um, I mentioned crossing over after the formation of the synaptonemal complex. The OP didn't.

Am i being an idiot, or did OP say meiosis, mitosis is what has been explained.
Meiosis involves independent segregation and crossing over right? Or are the two processes almost identical.

My point was I think OP got meiosis and mitosis mixed up

my explanation was of meiosis.
But only the 1st division. Where two haploid cells are formed.

The guy with the long explanation was correct, however that was A2 level. What you put at the top is fine. The second stage is also very similar to the first. He said it was similar to mitosis in the second stage because you can't split haploid cells


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You are looking for differences, right?

In comparison to meiosis, mitosis creates two diploid daughter cells which are identical to the mother cell in terms of genetics, while meiosis creates four haploid daughter cells which are not genetically identical to the mother cell. Thus meiosis is capable of creating gametes and genetical variability of the descendants is possible. Against that mitosis is just a breeding of cells which are not able to create genetical variability.

Moreover mitosis has more processes in comparison to meiosis.

my explanation was of meiosis.
But only the 1st division. Where two haploid cells are formed.

Nope, I know the differences, I was under the impression that independent segregation and cross over occurred in meiosis I?