Haploid and monoploid

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Haploid and monoploid

Post by chinhkuqn on Fri Nov 25, 2011 2:21 am

As stated above, the haploid number (n) is the number of chromosomes in a gamete of an individual, and this is distinct from the monoploid number (x), which is the number of unique chromosomes in a single complete set. Gametes (sperm, and ova) are haploid cells. The haploid gametes produced by (most) diploid organisms are monoploid, and these can combine to form a diploid zygote. For example, most animals are diploid and produce monoploid gametes.
During meiosis, sex cell precursors have their number of chromosomes halved by randomly "choosing" one homologue, resulting in haploid gametes. Because homologous chromosomes usually differ genetically, gametes usually differ genetically from one another.


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