The production of offspring by sexual reproduction includes the fusion of two gametes, each with a complete haploid set of chromosomes. Gametes are formed from specialised diploid cells. This specialised kind of cell division that reduces the chromosome number by half results in the production of haploid daughter cells. This kind of division is called meiosis (meioun: to make small). The key features of meiosis are as follows:
Adjacent to a frequently-asked paragraph in the same chapter.
Assertion (A): Meiosis results in formation of four haploid cells. Reason (R): Each meiotic division is followed by two rounds of DNA replication.
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