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Haploid and Diploid life cycle? |
A life cycle that includes both the 1n state and the 2n stage is referred to as the haploid-diploid life cycle. These two stages are separated by the processes of meiosis and syngamy (fertilization of gametes). Sexually reproducing organisms undergo meiosis (reductional cell division in which the number of chromosomes per cell is halved). Meiosis leads to four haploid gametes each of which contains one of every pair of maternal and paternal chromosomes. Mitosis is a process by which a cell divides chromosomes into two identical sets. Once the cells undergo mitosis, the organism can do one of two things. It can produce gametes through mitosis or it can start asexual reproduction. |