Yeah,I get that, it is a complicated topic and difficult to simplify(Original post by longshot100)
Just checked my own post, and yeah I did say "at most two", didn't I? I was just trying to make a point and I was focusing more on trying to make my overall explanation legible.
Why do cells divide 4 times in meiosis instead of twice? Watch
- 03-06-2016 22:20
- 10-02-2017 21:14
In case anyone's still interested.. I think this is a really good question. Theoretically instead of chromosomes making copies and dividing into 4, the cell could just split in two and you still have 23 chromosomes in each. Genetic recombination and exchange of DNA is still perfectly possible between the chromosomes. So why does the body go to all of the trouble of making copies of chromosomes and splitting the cell twice? Especially if the end result is the same..
The theory is because Meiosis is evolved from Mitosis. Before there were animals who could mate and reproduce with gametes, single celled organisms such as bacteria would reproduce using mitosis. During mitosis chromosomes have to be replicated in order to produce a functional clone of a cell. As meiosis developed, instead of changing the whole process of cell replication and eliminating chromosome replication, the cell would divide twice instead of once. This produces haploid cells or gametes.