The total 36 autosomes represents the diploid stage, called 2n. The half of the diploid number 2n is called the haploid number, n. If the diploid stage is 36+2= 38 number of chromosomes, the haploid stage is 19number of chromosomes.
The somatic cells are autosomes which are diploid cells containing 2n number of chromosomes and the gametes (the cells involved in reproduction) contain the n, haploid number of chromosomes. By the fusion of egg and sperm, the zygote is formed. The zygote is diploid since the egg (haploid) and sperm (haploid) after their fusion. The zygote undergoes mitosis and meiosis to produce haploid cells. Meiosis is reductional division in which the dipoid cells are divided into haploid cells. They derive into somatic cells and sex cells.
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