My question is:
why does meiosis needs chromosomes replication in S phase? Why would not it have been developed through evolution, for example, just to do recombination between homologous chromosomes right away and split the recombined chromosomes to get two haploid cells?
Meosis is uniform in the way it functions for all multicellulals, where it is used, so it must be that the current process details are advantegous to other combinations.
One benefit I would see is production of more gametes, which deals with two-fold cost of sex better. But again, the cell could be replicating genes for 2 or more times, in meiosis, to be even more efficient, but only this unique model with single replication is ubiqutous.
What are the exact benefits of it?
I hope you understand my question well. Thank you for helping
Edited by mr02077, 14 September 2018 - 07:28 AM.