How do chromosome numbers change across the stages of Meiosis I and II?

It's actually pretty fascinating how the math works out in cells. If you start with a human cell that has 46 chromosomes, the whole point of Meiosis I is to cut that number in half. By the end of this first division, you end up with two daughter cells, each having 23 chromosomes. Even though the DNA has been replicated before this starts, the homologous pairs separate, so the ploidy drops from diploid to haploid right there.

Then comes Meiosis II, which feels a lot more like a standard mitosis. Since you already have those 23 chromosomes in each cell, this stage doesn't change the chromosome count any further. Instead, it just splits the sister chromatids apart. So, you end up with four cells in total, and each one still has 23 chromosomes. It’s a super precise process, and honestly, it’s amazing that our bodies manage to pull this off without any hitches most of the time.