Zygote
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A zygote is a eukaryotic cell formed by a fertilization event between two gametes.
Zygote formation: egg cell after fertilization with a sperm. The male and female pronuclei are converging, but the genetic material is not yet united.
Views of a Foetus in the Womb detail
Meiosis
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Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes: the sperm or egg cells. It involves two rounds of division that ultimately result
Zygote
…combine to form a single diploid cell called the zygote. Once the single sperm fuses with the oocyte, the latter completes the division of the second meiosis forming a haploid daughter with only 23 chromosomes, almost all of the cytoplasm, and the male pronucleus. The other product of meiosis is the second…
A diagram depicting nondisjunction in the maternal cell during the Meiosis I phase, resulting in gametes with an extra chromosome. Through fertilization of this egg, an offspring with the condition trisomy 21 is produced.