Ntau npaum li cas DNA Do dev sib koom nrog tib neeg? Yam Koj Yuav Tsum Paub

Cov txheej txheem:

Ntau npaum li cas DNA Do dev sib koom nrog tib neeg? Yam Koj Yuav Tsum Paub
Ntau npaum li cas DNA Do dev sib koom nrog tib neeg? Yam Koj Yuav Tsum Paub
Anonim

Muaj kev sib cav txog kev sib raug zoo ntawm tib neeg thiab tsiaj txhu, tshwj xeeb tshaj yog thaum nws los txog DNA thiab noob caj noob ces. Tib neeg thiab primates muaj ntau tshaj plaws, tab sis lawv tsis yog tib yam tsiaj uas peb muab DNA nrog. Txij li thaum tag nrho cov tsiaj muaj qee feem pua ntawm lawv cov DNA nrog peb, peb txhua tus tau txuas nrog. Tab sis ntau npaum li cas DNA peb koom nrog peb cov phooj ywg ntev ntev?Peb sib koom ib ncig ntawm 80-85% ntawm DNA nrog dev, uas yog ib qho feem pua zoo siab heev.

DNA yog dab tsi?

DNA yog ib feem tseem ceeb ntawm tag nrho cov tsiaj muaj sia, qhov chaw uas peb lub cev khaws peb cov caj ces. Luv luv rau deoxyribonucleic acid, DNA zoo li phau ntawv qhia txog kev yug me nyuam thiab ciaj sia. Peb tuaj yeem tau txais qee cov noob thiab cov xwm txheej, uas dhau los ntawm ob peb chromosomes los ntawm peb niam txiv. DNA feem ntau muaj nyob rau hauv lub nuclei ntawm cov hlwb, nrog ib tug me me nyob rau hauv lub mitochondria.

DNA
DNA

Dogs Puas Muaj Tus lej Chromosome Pairs?

Tib neeg thiab dev ob leeg tau txais khub ntawm chromosomes, uas muaj ib daim qauv ntawm txhua tus niam txiv. Thaum peb sib koom ntau qhov xav tsis thoob ntawm DNA, peb tsis muaj tib tus lej ntawm chromosome khub. Peb muaj 23 khub ntawm chromosomes, nrog rau tag nrho 46 chromosomes. Cov dev muaj 38 khub ntawm chromosomes, nrog rau 76 chromosomes tag nrho.

Dab puas tuaj yeem kuaj DNA?

Yog lawm, dev tuaj yeem kuaj DNA, tab sis kev tshawb fawb thiab thev naus laus zis tseem tshiab. Feem ntau cov kev ntsuam xyuas yog qhov tseeb, tab sis lawv yeej tsis yog ruam. DNA kuaj kuaj cov hlwb los ntawm cov qauv, nrhiav cov cim caj ces tshwj xeeb. Cov cim caj ces no tuaj yeem pab txiav txim siab yug tsiaj thiab muaj peev xwm kho mob caj ces, uas yog vim li cas kev kuaj DNA thiaj li nrov.

Kev kuaj DNA rau tib neeg thiab dev yog ze li qhov zoo ib yam, siv cov hlwb los ntawm qaub ncaug lossis cov quav quav. Qhov sib txawv tseem ceeb yog qhov chaw kuaj mob kho cov txheej txheem kuaj rau dev DNA, ua kom cov txiaj ntsig tau siv tau thiab raug. Kev kuaj DNA tuaj yeem pab tus tswv tsev kom nkag siab txog tej yam xws li caj ces kab mob, yug cov ntaub ntawv thiab muaj peev xwm ua tau tus dev purebred.

Dog DNA thiab tsiaj txhu los ntawm tsev neeg Canidae

Grey Wolves

hma grey
hma grey

Grey Wolves yog cov txheeb ze ze tshaj plaws rau cov neeg paub Canis, tseem hu ua cov dev hauv tsev. Lawv sib koom 99.9% ntawm DNA thiab tuaj yeem yug me nyuam, ua cov xeeb ntxwv. Txawm hais tias dev thiab hma muaj feem cuam tshuam, dev tsis tau nqis ncaj qha los ntawm hma. Ob hma thiab dev los ntawm cov poj koob yawm txwv ntawm tsev neeg Canidae.

Coj

coyote nyob rau hauv qus
coyote nyob rau hauv qus

Aub kuj muaj feem cuam tshuam nrog coyotes, txawm tias tsis ntau npaum li hma. Tseem, coyotes muaj peev xwm yug me nyuam nrog dev, tsim coyote-dog hybrids hu ua "coy dogs". Cov me nyuam hybrid thaum kawg tuaj yeem tsim dua tshiab, uas yog tib yam li hma-dog hybrids.

African Wild Dogs

African qus dog
African qus dog

Txawm hais tias African Wild Dogs muaj "dub" hauv lawv lub npe, lawv tsis cuam tshuam nrog dev. Ob leeg tsis tuaj yeem tsim ua ke, vim lawv tsis yog los ntawm tib lub genus ntawm tsev neeg Canidae. Txawm li cas los xij, lawv tseem muaj cov caj ces txaus los qhia tib tsev neeg kev tshawb fawb, uas tseem suav nrog hma.

Conclusion

DNA yog qhov kev tshawb fawb txog kev kawm nyuaj heev, tab sis kuj yog ib qho tseem ceeb rau tib neeg thiab tsiaj txhu. Cov noob caj noob ces ua lub luag haujlwm tseem ceeb hauv kev noj qab haus huv, tab sis nws kuj pab peb nkag siab tias peb muaj feem cuam tshuam li cas rau lwm cov tsiaj. Cov dev thiab tib neeg sib koom ntau ntau dua li qhov nws yuav zoo li, nrog ntau dua 80% ntawm peb cov DNA sib xws. Raws li thev naus laus zis rau kev kuaj DNA nce qib, peb yuav nthuav tawm cov ntaub ntawv ntau dua li yav dhau los.

Pom zoo: