https://en.wikipedia.org/wiki/Ploidy
https://en.wikipedia.org/wiki/Gamete
https://en.wikipedia.org/wiki/Somatic_cell
Meiosis
https://en.wikipedia.org/wiki/Meiosis#Meiosis_II
https://en.wikipedia.org/wiki/Oocyte
https://en.wikipedia.org/wiki/G0_stage
https://en.wikipedia.org/wiki/G1_phase
https://en.wikipedia.org/wiki/Cell_cycle
https://en.wikipedia.org/wiki/Homologous_chromosome
https://en.wikipedia.org/wiki/Chromatid
https://en.wikipedia.org/wiki/Sperm
https://en.wikipedia.org/wiki/Polar_body
https://en.wikipedia.org/wiki/Zygote
https://en.wikipedia.org/wiki/Pronucleus
https://en.wikipedia.org/wiki/Blastocyst
Zygosity § Heterozygous
https://en.wikipedia.org/wiki/Embryonic_stem_cell
Gametogenesis