Wadatacce
- menene dimorphism na jima'i
- Abubuwan da ke haifar da dimorphism na jima'i a cikin dabbobi
- Misalan dimorphism na jima'i a cikin dabbobi
- Misalan dimorphism na jima'i a cikin dabbobin polygynous
- Misalan dimorphism na jima'i a cikin dabbobi don bambanta kansu
- Misalan dimorphism na jima'i a cikin dabbobi ta hanyar yin jima'i
- Misalan dimorphism na jima'i a cikin dabbobi inda mata suka fi girma
- Sauran misalan dimorphism na jima'i a cikin dabbobi
- dimorphism na jima'i a cikin mutane
Haihuwa ta hanyar haifuwa ta jima'i, a mafi yawan lokuta, yana da fa'ida sosai, amma babban fasalin wannan dabarar haihuwa shine kasancewar kasancewar jinsi biyu. Gasar neman albarkatu, haɗarin ƙaddara, ƙimar kuzarin da ke tattare da nemowa da neman abokin tarayya na yin nau'ikan iri dabbobi sun samo asali don sauƙaƙe wannan tsari.
A cikin wannan labarin ta PeritoAnimal za mu yi magana game da shi dimorphism na jima'i - ma'ana, mara ma'ana da misalai magance abubuwan da ke haifar da shi da abin da aikinsu ke da shi bisa ga nau'ikan daban -daban. Kyakkyawan karatu.
menene dimorphism na jima'i
Tsarin dimorphism na jima'i shine halayen da ke bambanta jinsi ɗaya daga wata tsakanin dabbobi da tsirrai. A matsayin ra'ayi da ɗan adam ya bayyana, kawai jinsin da maza da mata za mu iya bambanta da ido tsirara za su sami dimorphism na jima'i. Idan an ƙaddara wannan dimorphism ta hanyar pheromones ko ƙanshin da jinsi daban -daban ke fitarwa ba ta halayyar gani ba, ba za a kira shi dimorphism ba.
Dimorphism na jima'i da aka bayyana azaman bambance -bambance a cikin girman da ilimin halittar jiki tsakanin jinsi ya bazu a cikin mulkin dabbobi. Charles Darwin ya lura da wannan kuma yayi ƙoƙarin bayar da bayani ta hanyoyi daban -daban. A gefe guda, ya ce da jima'i dimorphism an yi niyya don zaɓin jima'i, dimorphism shine fa'ida, alal misali, ga maza masu gasa da juna don mata. Wani hasashe wanda ya dace da na baya shine cewa dimorphism na jima'i, ban da hidimar zaɓin jima'i, na iya haɓaka a matsayin gasa don abinci ko albarkatu gaba ɗaya.
Ya kamata a yi la'akari da cewa a yawancin lokuta wannan dimorphism na jima'i yana sa mutumin da ke ɗauke da shi mai haske sabili da haka mafi kusantar faɗuwa.
Abubuwan da ke haifar da dimorphism na jima'i a cikin dabbobi
Babban abin da ke haifar da dimorphism na jima'i shine jinsin halitta, galibi ana bayyana shi ta chromosomes na jima'i. A mafi yawan lokuta dimorphism jima'i a dabbobin daji, mata suna da chromosomes X guda biyu kuma maza suna da chromosome X da Y, wanda ke tantance ko an haife su namiji ne ko mace. A yawancin jinsunan da ba sa rarrabuwar kawuna, mata za su sami chromosome na jima'i guda ɗaya kuma maza za su sami biyu.
Wani muhimmin mahimmanci shine hormones. Kowane jinsi ya bambanta da juna ta fuskoki daban -daban na wasu hormones. Hakanan, a lokacin bazara tayi tayiA cikin wasu nau'ikan, babban taro na testosterone a cikin kwakwalwa zai sa ta girma a matsayin mace.
DA abinci kuma yana da mahimmanci don ingantaccen haɓaka halayen jima'i na sakandare wanda zai haifar da dimorphism. Dabba mara lafiya da rashin abinci mai gina jiki za su yi rashin dimorphism kuma wataƙila ba za ta jawo hankalin jinsi ba.
DA yanayi da kuma lokacin saduwa yana haifar da dimorphism ya bayyana a wasu nau'ikan inda halayen dimorphism na jima'i ba su bayyana a sauran shekara. Wannan lamari ne ga wasu tsuntsaye.
Misalan dimorphism na jima'i a cikin dabbobi
Don fahimtar daban -daban nau'ikan dimorphism na jima'i, hanya mafi sauki ita ce lura da jerin gwanon jinsuna daban -daban da salon rayuwarsu.
Misalan dimorphism na jima'i a cikin dabbobin polygynous
A yawancin lokuta, dimorphism na jima'i ana iya bayyana shi azaman gasar mata. Wannan yana faruwa a cikin dabbobin polygynous (ƙungiyoyin mata da maza ɗaya ko kaɗan). A cikin waɗannan lokuta, maza dole ne su yi gasa don samun damar yin aure da mata, wanda hakan ke sa su fi girma, ƙarfi da ƙarfi fiye da su. Hakanan, galibi suna da wani jiki wanda ke aiki azaman kariya ko laifi. Wannan lamari ne, alal misali, tare da dabbobi masu zuwa:
- Barewa
- Giwa
- Dabba
- Chimpanzee
- Gorilla
- Dawisu
- girma grouse
- Boar
Misalan dimorphism na jima'i a cikin dabbobi don bambanta kansu
A cikin sauran dabbobin, akwai dimorphism don a rarrabe mata da maza iri ɗaya daga juna. Wannan shine lamarin tare da parakeets. O dimorphism na jima'i a cikin waɗannan tsuntsaye ana samunsa a cikin baki, a wani yanki da ake kira "kakin zuma". Mace suna da wannan ɓangaren launin ruwan kasa da ƙarami kuma maza suna da taushi da shuɗi. Don haka, idan zakin fentin mace ya yi shuɗi, maza za su kai mata hari, kuma idan an yiwa namiji fentin launin ruwan kasa, za a yi masa aure a matsayin mace.
Misalan dimorphism na jima'i a cikin dabbobi ta hanyar yin jima'i
Wani misali na dimorphism jima'i an ba shi ta hanyar yin jima'i a cikin nau'in. Don haka, kwaɗi da ke rungumar mata a lokacin yin ɗorawa suna da ƙarfi, ingantattun makamai, da yana iya samun ƙaya a hannun don riƙe mafi kyau.
Hakanan ana iya amfani da Dimorphism azaman wani yanki na soyayya. Wannan haka yake da tsuntsayen aljanna. wadannan tsuntsaye ba su da dabbobin daji a wurin su na asali, saboda haka, samun kuzari mai ƙarfi, fuka -fukai masu tsayi a kan wutsiya ko kai ba sa sa su zama masu saurin kamuwa da cutar, amma kyakkyawar jan hankali ce ga mata. Wannan furen ba wai kawai yana jan hankalin mata ba ne, har ma yana ba da bayani game da lafiyar lafiyar namiji da yuwuwar samun zuriyar lafiya.
Misalan dimorphism na jima'i a cikin dabbobi inda mata suka fi girma
Tsuntsayen mata masu farauta, kamar gaggafa, mujiya ko shaho, sun fi maza girma, wani lokacin ma sun fi girma. Wancan ne saboda yawanci shine mace da ke ciyar da karin lokaci a cikin gida incubating qwai, saboda haka, girma zai taimaka masa wajen kare gida. Hakanan, waɗannan matan galibi sun fi maza ƙarfi fiye da maza, don haka girman su yana taimakawa.
A cikin ƙungiyar arthropod, mata sun fi girma girma fiye da maza, kamar yadda lamarin yake gizo -gizo, mantises na sallah, kuda, sauro, da dai sauransu. Haka yake faruwa da dabbobi masu rarrafe da dabbobi masu rarrafe, inda mata ma sun fi girma.
Sauran misalan dimorphism na jima'i a cikin dabbobi
Akwai kuma wasu lokuta na musamman, irin su kuraye. Mace, kafin haihuwa, kusan ba a iya bambanta su da maza. Suna da gindin da ya kai girman azzakarin namiji, lebban su na tsawaita kuma suna kama da kumburi. Bayan haihuwa, ana ganin nonuwa don a gane su. Hakanan, sun fi maza girma da yawa, wannan saboda dabbobi ne masu cin naman mutane kuma kowane namiji na iya ƙoƙarin cin ɗan maraƙi. Don kauce wa wannan, ana buƙatar yawan mace da ƙarfi da ƙarfi.
dimorphism na jima'i a cikin mutane
Hakanan mutane suna da dimorphism na jima'i, kodayake wasu binciken suna ba da shawarar cewa babu tsananin mata ko namiji kuma ɗan adam yana son haɗa halayen jima'i, wato, a cikin jinsin mu akwai maza da yawa maza ko mata da yawa ko ƙasa da mata. Su ne mizani na al'adu da ƙawa wanda ke kai mu ga al'adar banbancin jima'i.
A balaga, mata da maza sun fara haɓaka gabobin jima'i, na gani daban da juna. Gashi yana bayyana a kan yatsun hannu, mashaya, fuska, kafafu da sauran sassan jiki. Maza, a dabi'ance, suna da ƙarin gashi a fuskokinsu da sauran sassan jiki, amma maza da yawa ba sa. Mata kuma suna da gashi a leɓensu na sama.
Hali na musamman na mata shine ci gaban mammary gland, da tsarin kwayoyin halitta da sinadarin hormones suka tsara shi, kodayake ba dukkan mata ne ke da matakin ci gaba iri daya ba.
Yanzu da kuka san ma'anar dimorphism na jima'i kuma kun ga misalai da yawa, kuna iya sha'awar wannan labarin inda muke bayanin ko akwai dabbobin ɗan luwaɗi. Kada ku rasa shi.
Idan kuna son karanta ƙarin labarai makamantansu Dimorphism na Jima'i - Ma'ana, Sauƙi da Misalai,, muna ba da shawarar cewa ku shiga ɓangaren Curiosities na duniyar dabbobi.