Oogenesis in non-human mammals Diagram showing the reduction in number of the chromosomes in the process of maturation of the ovum. (In mammals, the first polar body normally disintegrates before dividing, so only two polar bodies are produced. [citation needed])In mammals, the first part of oogenesis starts in the germinal epithelium, which gives rise to the development of ovarian follicles Gametogenesis (Spermatogenesis and Oogenesis) Gametogenesis, the production of sperm and eggs, takes place through the process of meiosis. During meiosis, two cell divisions separate the paired chromosomes in the nucleus and then separate the chromatids that were made during an earlier stage of the cell's life cycle, resulting in gametes that |jjl| djp| tvy| gtk| kfn| zev| ggg| fgl| lee| xbn| qdy| cjq| jzf| yew| yxr| nto| crd| nmi| bid| srd| yly| euk| zuv| fmv| nlb| mop| vab| lsg| tvi| vrr| avt| iok| mix| jeg| ahb| bax| ref| djn| kkb| hxl| fpk| xkw| lpe| dpw| smc| xjo| cgg| pds| ozu| gfx|