Video: Yuav ua li cas yog lub neej kev yug me nyuam txoj kev vam meej?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub neej Kev ua me nyuam ua tiav (LRS) yog ib qho kev kwv yees siv feem ntau ntawm tus kheej. Fitness (Clutton-Brock, 1988; Newton, 1989). Nws tuaj yeem txhais tau tias tag nrho cov xeeb ntxwv ntawm ib tus neeg tsim tawm tag nrho nws lub neej tom qab qee qhov tseem ceeb. theem tau tiav lawm (piv txwv li tus naj npawb ntawm weaned cov hluas hauv cov tsiaj txhu.
Tib neeg kuj nug hais tias, kev loj hlob zuj zus txhais li cas?
Kev loj hlob zoo txhais tau tias yog ib tus neeg tsim cov xeeb ntxwv ib qho kev tshwm sim los yog lub neej. Qhov no tsis yog txwv los ntawm tus naj npawb ntawm cov xeeb ntxwv tsim los ntawm ib tus neeg, tab sis kuj yog kev loj hlob zoo ntawm cov xeeb ntxwv lawv tus kheej.
Koj yuav ua li cas xam cov kev loj hlob zoo? ARS(b) tsuas yog tus naj npawb ntawm cov broods reared faib los ntawm cov poj niam, thiab ARS (k) yog tus naj npawb ntawm cov tub ntxhais hluas reared muab faib los ntawm cov poj niam. kuv xav tias xam ARS(b) thiab ARS(k) nyob rau hauv txoj kev no poob cov ntaub ntawv tseem ceeb, xws li qhov sib txawv hauv kev vam meej nruab nrab ntawm thawj thiab tom qab brood clutches.
Ib yam li ntawd, nws raug nug, qhov twg yog lub ntsiab lus zoo tshaj plaws ntawm kev yug me nyuam txoj kev vam meej?
Kev loj hlob zoo . Kev loj hlob zoo yog txhais raws li kev dhau ntawm cov noob mus rau tiam tom ntej nyob rau hauv ib txoj kev uas lawv ib yam nkaus yuav kis tau cov noob rau. Hauv kev xyaum, qhov no feem ntau yog qhov suav ntawm tus naj npawb ntawm cov xeeb ntxwv uas tsim los ntawm ib tus neeg.
Kev loj hlob zoo li cas cuam tshuam rau kev xaiv ntuj?
Overproduction of offspring: Nyob rau hauv ib tiam neeg, cov pejxeem yuav tsim ntau progeny tshaj li muaj sia nyob mus kev yug me nyuam hnub nyoog. Kev sib tw rau cov peev txheej: Vim muaj neeg coob coob, cov tib neeg yuav tsum sib tw rau zaub mov, chaw zes, phooj ywg, lossis lwm yam khoom siv uas cuam tshuam lawv muaj peev xwm ua tau zoo dua qub.
Pom zoo:
Txoj kev yug me nyuam yog dab tsi?
Nyob rau hauv txoj cai, nws muaj peev xwm paub qhov txawv ntawm uncontrolled mating thiab kab yug me nyuam. Nyob rau hauv genetic terminology, kab yug me nyuam yog hais txog mating nyob rau hauv ib tug tshwj xeeb yug nyob rau hauv uas ib tug tej yam xov tooj ntawm noob caj noob ces muaj. Hauv txoj ntsiab cai, yuav tsum muaj qhov sib txawv ntawm kev sib raug zoo ntawm kev yug me nyuam thiab inbreeding
Yam dab tsi tswj lub cell txoj kev vam meej los ntawm lub voj voog ntawm tes?
Kev Tswj Xyuas Zoo ntawm Cell Cycle Ob pawg ntawm cov proteins, hu ua cyclins thiab cyclin-dependent kinases (Cdks), yog lub luag haujlwm rau kev nce qib ntawm tes los ntawm ntau qhov chaw kuaj xyuas. Cov qib ntawm plaub cyclin proteins hloov pauv thoob plaws hauv lub voj voog ntawm tes hauv cov qauv uas xav tau (Daim duab 2)
Yuav ua li cas yog qhov tshwm sim uas ib tug poj niam dig muag xim uas yuav ib tug txiv neej uas tsis pom kev zoo yuav muaj xim dig muag me nyuam?
Yog tias tus poj niam uas muaj lub zeem muag zoo li no (heterozygous rau qhov muag tsis pom xim) yuav ib tug txiv neej ib txwm muaj (XY), cov xeeb ceem hauv qab no tuaj yeem xav tau hauv F2 tiam: ntawm cov ntxhais, 50% yog ib txwm muaj thiab 50% yog cov neeg nqa khoom rau cov kab mob; ntawm cov tub, 50% yog xim dig muag thiab 50% yog qhov pom kev zoo
Qhov twg yog txoj kev yug me nyuam qub?
Kev xaiv kuj hu ua German txoj kev yog txoj kev cog qoob loo qub tshaj plaws. Nws yog kev khaws cia ntawm cov nroj tsuag ntawm cov cim xav tau thiab tom qab ntawd loj hlob lawv
Yuav ua li cas kuv yuav tau txais ib tug me nyuam 8 xyoo rau nws lub hnub yug?
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