So, once again, we're dealing with only well, if we take a look at our normal human carotype, technically speaking, we should be showing all these individual chromosomes within the cell. But to save time, I'm only going to focus on the 23rd chromosome pair, our sex chromosome pair. So we're not going to consider the autosomal chromosomes in this particular case. So before meiosis actually takes place and before this male individual can produce sperm cells, those chromosomes must replicate themselves during the process of interface. And so the x chromosome is replicated to produce this identical x chromosome, and the y chromosome is also replicated to produce this identical cystochromatid. So normally, what should happen during normal conditions is during metaphase one of meiosis, these pairs basically line up at the equator of our cells.