The number of chromosomes present in the body cells of a diploid organism.
- For chromosomal non-disjunction, the scoring was restricted to binucleated cells having the diploid number for the chromosomes analysed (two spots for each of the two probes).
- The two meiotic cell divisions reduce the diploid number of chromosomes in the precursor cells to the haploid number in the gametes.
- In this family a wide range of chromosome diploid numbers is observed and, moreover, an extensive chromosome and karyotype polymorphism in some species has been described.
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