Me ne wani mutum a can?

A dalilan ga wanzuwar maza sun dade dami zukatan masana kimiyya. Jima'i haifuwa ne wanda ya kasa aiki da kuma m, amma mafi jinsunan kwayar zabi wannan hanya su ci gaba da kwayoyin halittu. Wannan shi ne illogical. Saboda haka me ya sa shi ne wani mutum a can? Masu bincike daga Jami'ar Gabas Anglia yi imani da cewa, watakila, a karshe fashe da code. Sun bayar da shawarar cewa juyin karfi, da aka sani a matsayin jima'i selection taka wata muhimmiyar rawa a inganta kiwon lafiyar jama'a, da kuma kariya jinsin daga nau'i nau'i.

sabon bincike

A wani binciken da aka buga a mujallar Nature, a subspecies na irin ƙwaro Tribolium aka zaba domin kallo domin fahimtar me ya sa yawancin kwayar kwayoyin fi son jima'i da irin haifuwa. Karkashin sarrafawa awon yanayi, masu bincike karatu 50 ƙarnõni na beetles shekara goma da aka rinjayi jima'i selection. Idan muka dauki matsayin dalilin da ka'idar Charles Darwin, jima'i selection ne tsari da wanda maza gasa ga damar asali, da mãtã zabi ga waɗanda sun kasance a shirye don samar da zuriya.

kimiyance

"Kusan duk kwayar jinsunan a duniya haifa ta hanyar jima'i, amma ta zama ba haka ba ne sauki bayyana, saboda irin wannan ya kawo manyan lodi da bukatar gagarumin makamashi ta halin kaka. Bugu da kari, a bayyane ne da cewa kawai rabin na zuriyarka, da 'ya'ya mata za zahiri sun zurriyarsu. Me ya sa jinsunan ciyar da lokaci da makamashi ko da ɗiya maza? " - nuna gubar bincike Farfesa Mett Geydzh na UEA School, ya ce a cikin wata sanarwa.

bincike aiki

"Mun so mu fahimci yadda Darwin selection bada wannan tartsatsi sabon abu, da kuma dalilin da ya sa haihuwa tsarin ne don haka m Bayan wani tsari a cikin abin da duk mutanen da nuna zuriyarsa ba tare da jima'i, kamar yadda a duk asexual alƙarya, shi zai zama yafi dacewa.", - ya fa a cikin binciken.

A sakamakon gwajin

Masana kimiyya sun gano cewa a lokacin da gasar da aka shafe, da kuma beetles sun kawai a monogamous nau'i-nau'i, mai yawan ta kiwon lafiya rincabewa. Conversely, da zũriyarsu, da samu a karkashin zafin gasar a lokacin da 90 maza da 10 mãtã, sun kasance mafi resistant zuwa cututtuka da kuma nau'i nau'i.

"A don ya zama mafi kyau na gasar hammayarsu da kuma jawo hankalin abokan, wani mutum dole ne ya zama mai kyau a mafi yawan abubuwa, don haka da cewa jima'i selection ne mai muhimmanci da kuma tasiri tace don kula da inganta kwayoyin kiwon lafiya na yawan - ya ce Gage -. Our sakamakon samar kai tsaye goyon baya ga ra'ayin cewa jima'i ya ci gaba da zama a matsayin rinjaye hanyar haifuwa, saboda shi ba ka damar yin jima'i selection, don samar da wadannan muhimmanci kwayoyin amfani. "

A binciken da ya nuna cewa sabon abu na jima'i selection taka wata muhimmiyar rawa a cikin sifting cutarwa kwayoyin maye gurbi, tun gasar ne m iya Dede da mace genetically gurgunta namiji.