Wadatacce
- Menene haifuwar asexual
- Nau'in Haihuwar Asexual tare da Misalai
- 1. Yawaitar kayan lambu:
- 2. Parthenogenesis:
- 3. Gynogenesis:
- Haihuwar Asexual azaman dabarar rayuwa
- Dabbobi tare da haifuwar asexual
DA haifuwa aiki ne mai mahimmanci ga dukkan halittu masu rai, kuma yana daya daga cikin muhimman ayyuka guda uku da rayayyun halittu ke da su. Ba tare da hayayyafa ba, dukkan nau'ikan za su lalace daga halaka, kodayake kasancewar mata da maza ba lallai bane koyaushe don haifuwa ta faru. Akwai dabarar haifuwa da ake kira haifuwa ta asali wacce ke zaman kanta (a kusan dukkan lokuta) na jima'i.
A cikin wannan labarin PeritoAnimal, zamuyi magana game da shi dabbobin jinsi da misalansu, farawa da bayanin kalmar "haifuwa ta asexualBugu da kari, za mu nuna wasu misalai daban -daban na kwayoyin halittar jima'i.
Menene haifuwar asexual
Haihuwar Asexual shine dabarun haihuwa wasu dabbobi da tsire -tsire suke yi, wanda kasancewar manyan mutane biyu na jinsi daban -daban ba lallai ba ne. Irin wannan dabarar tana faruwa ne lokacin da mutum ya samar da zuriyar da ta yi kama da na su. Wani lokaci muna iya samun kalmar clonal haifuwa, kamar yadda ya haifar da clones na iyaye.
Hakanan, a cikin wannan nau'in haifuwa babu ƙwayoyin ƙwayoyin cuta (ƙwai ko maniyyi) da ke da hannu, tare da banbanci guda biyu, parthenogenesis da gynogenesis, waɗanda za mu gani a ƙasa. maimakon su somatic sel (wadanda suka hada dukkan kyallen jikin mutum) ko tsarin jiki.
Nau'in Haihuwar Asexual tare da Misalai
Akwai ire -iren ire -iren ire -iren iri da yawa a cikin dabbobi, kuma idan muka haɗa da tsirrai da ƙwayoyin cuta, wannan jerin yana ƙara tsayi. Na gaba, za mu nuna muku mafi yawan dabarun haihuwa na dabbobi a cikin duniyar kimiyya kuma, sabili da haka, sananne.
1. Yawaitar kayan lambu:
DA budding shi ne na al'ada asexual haifuwa na soso na ruwa. Yana faruwa lokacin da ƙwayoyin abinci ke tarawa a cikin takamaiman nau'in sel a cikin soso. Waɗannan sel suna ruɓewa tare da rufin kariya, suna ƙirƙirar gemmula wanda daga baya aka fitar, yana haifar da sabon soso.
Wani nau'in haifuwar ciyayi shine budding. Ƙungiyar sel akan farfajiyar dabbar ta fara girma don samar da sabon mutum, wanda a ƙarshe zai iya rarrabe ko tsayawa tare kuma ya zama mallaka. Wannan nau'in haifuwa yana faruwa a cikin hydras.
Wasu dabbobi na iya haifuwa ta rarrabuwa. A cikin wannan nau'in haifuwa, dabba na iya raba kashi ɗaya ko fiye kuma daga kowane ɗayan waɗannan ɓangarorin kowane sabon mutum yana tasowa.Za a iya ganin mafi kyawun misali a cikin tsarin rayuwa na kifin tauraro, saboda lokacin da suka rasa hannu, ban da iya sake farfado da shi, wannan hannun kuma yana haifar da sabon mutum, wanda shine clone na tauraron asali.
2. Parthenogenesis:
Kamar yadda muka fada a farko, parthenogenesis yana buƙatar kwai amma ba maniyyi ba. Kwan da ba a haifa ba zai iya canzawa zuwa sabon kwayoyin halitta. An fara bayyana wannan nau'in haifuwa ta asali a cikin aphids, nau'in kwari.
3. Gynogenesis:
Gynogenesis wani nau'in haifuwa ne na daban. Qwai yana buƙatar motsawa (maniyyi) don haɓaka tayi, amma ba ya ba da gudummawar jininsa. Saboda haka, zuriya clone ne na uwa. Maniyyin da aka yi amfani da shi bai kamata ya zama iri ɗaya da na uwa ba, iri ɗaya ne kawai. yana faruwa a amphibians da teleosts.
A ƙasa, muna nuna muku misalin ɓarnawar rarrabuwa a cikin kifin tauraro:
Haihuwar Asexual azaman dabarar rayuwa
Dabbobi ba sa amfani da wannan dabarar haihuwa azaman hanyar al'ada ta al'ada, a maimakon haka suna yin ta ne kawai a lokutan da ba daidai ba, kamar lokacin da ake samun canje -canje a muhalli, matsanancin yanayin zafi, fari, rashin maza, tsinkaye mai yawa, da sauransu.
Haihuwar Asexual yana rage canjin kwayoyin halitta, wanda zai iya haifar da bacewar wani yanki, rukuni ko yawan dabbobi idan aka ci gaba da sauye -sauyen yanayi.
Dabbobi tare da haifuwar asexual
Dabbobi da yawa suna amfani da haɓakar asexual don ci gaba da rayuwa a ƙasa da lokacin da ya dace. A ƙasa, za mu nuna muku wasu misalai.
- Spongilla alba: wani iri ne ruwa soso ya samo asali daga nahiyar Amurka, wanda za a iya sake bugawa ta budding lokacin da zazzabi ya kai -10 ° C.
- gizagizai: mallakar phylum na tsutsotsi ne ko tsutsa tsutsotsi. Suna zaune cikin ruwa mai daɗi kuma ana rarraba su ko'ina cikin Turai. Wadannan tsutsotsi suna haifuwa ta rarrabuwa. Idan an yanke shi zuwa sassa da yawa, kowannen su ya zama sabon mutum.
- Ambystoma altamirani: a salamander na rafin dutse, da sauran salamanders na jinsi Ambystoma, iya haifuwa ta ginogenesis. Suna daga Mexico.
- Ramphotyphlops braminus: macijin makaho asalinsa daga Asiya da Afirka ne, duk da cewa an bullo da shi a wasu nahiyoyin. Shin maciji ƙanana ƙanana, ƙasa da 20 cm, kuma yana sake haifuwa ta parthenogenesis.
- hydra oligactis: hydras wani iri ne jellyfish na ruwan sabo wanda zai iya haifuwa ta budding. Yana zaune a yankuna masu matsakaicin yanayi na arewacin duniya.
A cikin bidiyo mai zuwa, zaku iya lura da farfadowa bayan yankewar tsutsa mai tsini, musamman, na gizagizai:
Idan kuna son karanta ƙarin labarai makamantansu Haihuwar jima'i a cikin dabbobi,, muna ba da shawarar cewa ku shiga ɓangaren Curiosities na duniyar dabbobi.