Ukukhetha okwemvelo: i-dimorphism yobulili

I-dimorphism yezocansi iyinhlobo emkhakheni wezinhlobo zesifazane namadoda ezinhlobo ezifanayo. Isakazwa kabanzi phakathi kwabamele abadumi bezilwane noma izitshalo, futhi kubonakala kuzo izici ezinjalo zomuntu ngamunye:

1. Usayizi. Amadoda ahluke kwabesifazane ngesayizi, isibonelo, kubamele abesifazane besifazane abakhulu.
2. Isembozo sezinwele. Isibonelo, kubantu, lokhu kungaba khona kwebhere kumadoda.
3. Umbala. Isibonelo, ezinyoni, umbala wezimpaphe.
4. Isikhumba Sesikhumba. Ikhonjiswe ezinhlotsheni ezengeziwe nezici zobunikazi zesibili. Isibonelo, izimpondo zezinyamazane noma inqwaba yamakhupha.
5. Amazinyo. Ngokwesibonelo, ezincelweni zesilisa ezincelisayo, i-walrus noma indlovu, ama-fungs amancane kakhulu kunabesifazane.

Ngakho-ke, i-dimorphism yezocansi ingabizwa ngokuthi yinkomba yesithembu (ezingeni layo), futhi ngokucacile kuboniswa, ukungafani okuningi eminikelweni yowesifazane nowesilisa ekunakekeleni inzalo yabo. Ngezinye izikhathi i-PD ingazibonakalisa ngezibonakaliso ezinjalo, okunciphisa ukufaneleka kwabanikazi babo. Ngakho-ke, amaphuphu aqhakazile, ukucula okukhulu noma iphunga elicijile lezinyoni ezithile kuvame ukunaka izilwane ezidla inyama, okubeka ingozi empilweni yabo. Lokhu kubangelwa, cishe, hhayi ngokukhethwa kwemvelo, kodwa ngokukhetha ngokocansi.

I-dimorphism yobulili ivela ngezindlela eziningana:

1. I-PD yokukhiqiza - isondo sobulili, kokubili okuyisisekelo nesekondari, okuhlukile kokubili kobulili futhi kuhlobene nenqubo yokukhiqiza. Lolu uhlobo lwe-hormonal lwe-dimorphism ngokocansi, umsebenzi okuzohlanganisa uhlelo lwazo zobulili zombili.
2. I-dimorphism yobulili eguqukayo - yesikhashana futhi ivela ekushintsheni kobulili besifazane ngenxa yento yokhetho. Kulokhu, kuvela izakhi zofuzo ezintsha eziye zahlolwa ku-DNA yesilisa.

Ama-PDs abhekwa njengengxabano yezimfanelo zesifazane nabesilisa ekuhlosweni kokukhanga komunye nomunye, okudala isidingo sokukhiqiza ngokomzimba nokwengqondo komuntu. Ngakho-ke, kuhloswe ukukhiqizwa ngokusebenzisa isizukulwane, futhi ezingeni lezakhi zofuzo, ukudala ukulawulwa kwezinto eziphilayo kanye nokuthuthukiswa kokuzuzisa kakhulu izimfanelo.

Kumele kuthiwa ukuthi i-dimorphism yezocansi ibonakala ngenani elikhulu lokuhlukana ngokomzimba, somatic kanye nokuziphatha phakathi kwabantu abanobulili obuhlukile. Ngakho-ke, ngokusebenzisa ubulili besifazane kukhona ukukhethwa kokuqiniswa, ubulili besilisa kwenza kube khona ukuhlukahluka kwemvelo. Isayensi yanamuhla inikeza incazelo ecacile yokuthi kukhona ukungafani kobulili ezingeni ngalinye lokuthuthukiswa kwenyama.

Ezilwaneni PD zibhekene nokungafani kwesakhiwo sezitho zokucubungula noma izici zobunikazi zesibili. Lapha kungokwezifiso ukukhipha ubude besimo sonyaka nocansi njalo. Okokuqala akuxhomekile ezimweni zonyaka.

Ukufiphala komuntu ngesifo socansi kuboniswa ekuthuthukiseni okunamandla ama-skeleton and musculature, kanye ne-hairline ebesilisa wesilisa. Insikazi inamathumbu amathumbu amathumba amaningi athuthukile, ububanzi bezintambo bukhulu nakakhulu.

Ezitshalweni PD kuboniswa ngokungafani nesakhiwo nobukhulu beziqu, ubungako bamahlamvu, isakhiwo sezimbali futhi ngezindlela eziningi ezahlukene.

Ngakho-ke, ukubukeka nokuthuthukiswa kwe-dimorphism yocansi kuzo zonke izinto eziphilayo kuboniswa ithonya lokukhethwa kwemvelo nokucansi. Ngesikhathi esifanayo, i-biology yesimanje inezimpikiswano eziningi ekusekeleni iqiniso lokuthi i-PD ayichazwanga nje ekuphatheni nasekusebenzeni kwezitho zobulili, kufaka phakathi izici zamabanga aphansi, aphezulu kanye nezenzo zobulili ezihlobene nezinhlelo ze-sumatic nemisebenzi yazo. Singasho ukuthi zonke lezi zici zibhekisela kuzo zonke izigaba zenhlangano yendaba, kusukela ezingeni lemangqamuzana ukuya ezingeni lemvelo.