And these two chromosomes, just like these two individual chromosomes, are said to be homologous with respect to one another. So we basically double the number of chromatids, but the number of pairs remains the same. We have one pair and one pair here, but we have four chromatids here and only two chromatids here. So that means during s phase, we double the number of chromatids. Now, once our gametocides actually undergo the process of sphase, those gametocides are known as primary gametosides. So our male gametocides are known as primary spermatocides, while our female gametocides are known as primary oocytes.