Kuti anzwisise kuti zygote yakasiyana neipi yegetetes, munhu anofanira kutanga kutanga aziva tsanangudzo dzavo.
A gamete is reproductive cell iyo isina (kana haploid) yekromosomes inobatanidzwa mukuita zvepabonde. Izvi zvinoreva kuti mune mamwe mazwi, mazai ne spermatozoon ndiwo maketetet ane kateti ye chromosomes ye 23 mune imwe neimwe.
Zygote ndiwo mugumisiro wekukanganiswa kwemagetes maviri. Ndiko kuti, zygote inoumbwa semugumisiro wekusanganiswa kweii yekadzi uye chirume chemurume. Nokudaro, inowedzera kuva munhu (kwatiri, munhu) nehupenyu hwehupenyu hwevabereki vose.
Ndeipi iyo yemakromosomes inoita zygote?
Sezvazvinova pachena, seti ye chromosomes mu zygote inoumbwa semugumisiro wekukanganiswa kwema 23 chromosomes mune imwe neimwe yemaketetes emubereki, sezvo zygote pachayo inoumbwa panguva yekubatanidzwa kwemaketetesi maviri. Ikozvino, pane 46 chromosomes muzygote.
Basa reZygote uye gametes rakakwirira, sezvo pasina ivo vanoberekwa uye kuchinja kwechizvarwa hakugoneki. Mukuwedzera, kuumbwa kwe zygote uye kukura kwekupedzisira kwemarudzi matsva kubva ku zygote kunopa hupenyu hwehupenyu hwevanhu pasi pano.
Gametes (zvepabonde masero) inowanikwa kune chero ipi zvayo, kusanganisira mumunhu, mhuka shure kwekuyaruka kwayo. Aya masero anopiwa mabasa akasiyana. Idzo dzinotumira mashoko ane nhaka kubva kumarudzi kusvika kune mamwe marudzi. Nuclei yavo ine zveruzivo rune ruzivo rwemhaka yaro nehupenyu hutsva.
Kana tikarangarira zvakasiyana-siyana murume nemukadzi gametes, vane zvimwe zvakasiyana. Nokudaro, mazai ane zvakawanda zve cytoplasm nemuviri wezvokudya (yolk) inofanirwa kuti zvive zvakakonzerwa nekugadzirwa kwemazuva emangwana embryo. Mumuviri, pane zvinopesana, kune yakakura ye-vascular-cytoplasmic ratio, kureva, inenge yese serose inomiririrwa neyucleus. Izvi zvinokonzerwa nebasa guru rehuta - anoda kuburitsa zvinhu nokukurumidza sezvinobvira kuii.