Question About Gamete Formation
Hey guys, doing revision for exam. Can someone quickly explain how one diploid cell becomes four haploid gametes? I forgot most of the phases and why the chromosome number halves. Simple words please, my brain is tired.
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Sure! The whole process is called meiosis. Detailed explanation of all phases of meiosis is here if you want pictures and diagrams. Short version: DNA replicates once → cell divides twice. Meiosis I separates homologous chromosomes (maternal and paternal) → two haploid cells (but each chromosome still has two chromatids). Then Meiosis II separates sister chromatids → four haploid cells with one chromatid each. That’s why chromosome number is halved. Crossing over in prophase I and random alignment in metaphase I create variety. Very important for sexual reproduction and diversity.