Germinal diploid cells suffer meiosis and produce haploid gametes (eggs and sperm). Gamets merge and produce a diploid zygote, which suffers mitosis. 1st division: Meiosis / 13 chrom / 13 chrom/ 26 chrom/ 2nd division: Mitosis
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There are two principal types of cells in the organism: Somatic diploid cells (2n) that reproduce by the process of mitosis, and germ cells that are diploid reproductive cells in charge of gamete production. Â
Germ cells suffer both types of cell division Â
- mitosis to form more sexual cells Â
- meiosis to produce haploid gametes, called sperm and egg cells, through the gametogenesis process. Â
Both somatic cells and germinal cells will end their cycle becoming two daughter cells with the same genetic dotation.
Gametes' destiny is to merge during fecundation, through which a new diploid cell called zygote emerges.
The zygote is a complete cell from the structural point of view that suffer successive mitosis to form the new organism.
- Meiosis is a process by which, four daughter cells with a haploid chromosome number (n) are produced from a diploid germ cell (2n). Each daughter cell has half of the chromosomes of the original one.
- Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced. During mitosis, the whole-cell first duplicates and then separates.
According to this theoretical framwork,
- The type of cell division that produces eggs and sperm is MEIOSIS
- Each gamete has 13 chromosomes
- The Zygote has 26 chromosomes
- The type of cell division that suffers the zygote is MITOSIS
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