Video: Yuav ua li cas mus tsis ncaj ncees lawm nrog hla?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
1 Teb. Yog hla dhau tsis tshwm sim thaum meiosis, muaj yuav yog tsawg genetic variation nyob rau hauv ib hom. Kuj hom ua tau tuag vim muaj kab mob thiab tej kev tiv thaiv tau txais yuav tuag nrog tus kheej.
Raws li qhov tshwm sim ntawm kev hla dhau yog dab tsi?
Nws tshwm sim thaum meiosis. Hla mus yog kev sib pauv ntawm chromosome ntu ntawm cov uas tsis yog-viv ncaus chromatids thaum lub sij hawm tsim gametes. Cov nyhuv yog los sib sau ua ke (shuffle) cov alleles ntawm niam txiv chromosomes, kom cov gametes muaj kev sib txuas ntawm cov noob sib txawv ntawm leej niam leej txiv.
Kev hla dhau ntau npaum li cas? Hla mus yog kwv yees li tshwm sim kwv yees li tsib caug-tsib zaug hauv meiosis hauv cov txiv neej, thiab txog xya caum-tsib zaug hauv meiosis hauv poj niam.
Kuj tseem yuav paub, dab tsi ua rau tsis sib xws?
Kev hla tsis sib xws yog hom kev sib tw ntawm cov noob caj noob ces lossis tshem tawm cov xwm txheej uas tshem tawm ib ntu hauv ib txoj hlua thiab hloov nws nrog kev sib tw ntawm nws tus viv ncaus chromatid hauv mitosis lossis los ntawm nws cov chromosome homologous thaum lub sij hawm meiosis. Feem ntau cov noob yog lub luag haujlwm rau qhov tshwm sim ntawm hla dhau.
Dab tsi yog qhov tseem ceeb heev txog kev hla hla thiab thaum twg nws tshwm sim?
Hla Hla . Chromosomal hla dhau yog ib qho ntawm cov xwm txheej tseem ceeb tshaj plaws uas tshwm sim Thaum lub sij hawm gametogenesis - zus tau tej cov gametes (sperm thiab qe nyob rau hauv tib neeg). Yog hla dhau ua tsis yog tshwm sim , tom qab ntawd txhua ntawm plaub lub hlwb haploid tsim thaum lub sij hawm meiosis yuav nqa tib cov alleles raws li muaj nyob rau hauv niam txiv.
Pom zoo:
Lub hnub ncaj qha thiab tsis ncaj qha cuam tshuam li cas rau qhov kub thiab txias?
Lub hnub ncaj qha los tsoo lub ntiaj teb saum npoo ua rau muaj qhov kub thiab txias dua li lub hnub ci ncaj qha. Lub hnub ci dhau los ntawm huab cua tab sis tsis sov nws. Tsis tas li ntawd, lub teeb lub zog los ntawm lub hnub tsoo cov kua thiab cov khib nyiab ntawm lub ntiaj teb. Lub hnub ci poob sib npaug ntawm lawv txhua tus
Dab tsi tsis ncaj ncees lawm nrog evolutionary psychology?
Evolutionary psychologists feem ntau raug thuam vim tsis quav ntsej lub cev loj ntawm cov ntaub ntawv hauv kev puas siab puas ntsws, kev xav, kev nom kev tswv thiab kev kawm txog kev sib raug zoo. Nws yog qhov kev tshawb nrhiav rau ntau hom kev puas siab puas ntsws hloov pauv (lossis 'tib neeg xwm txheej') uas paub qhov txawv ntawm evolutionary psychology los ntawm kev piav qhia kev coj noj coj ua lossis kev sib raug zoo
Yuav ua li cas yog ib yam dab tsi tsis ncaj ncees lawm thaum lub sij hawm mitosis?
Kev hloov pauv hauv Chromosome Number Nondisjunction yog qhov tshwm sim ntawm kev ua tsis tiav ntawm chromosomes cais thaum lub sij hawm mitosis. Qhov no ua rau cov hlwb tshiab nrog cov chromosomes ntxiv lossis ploj lawm; ib qho mob hu ua aneuploidy. Rau cov me nyuam yug los nrog aneuploidy, mob caj dab hnyav tshwm sim
Yuav ua li cas yog tej yam yooj yim science ncaj ncees tej yaam num?
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Kev tua neeg tua ib tug neeg, tus cwj pwm tsis ncaj ncees yuav hem txhua tus. Bernard tau ua txhaum ntawm kev coj tus cwj pwm tsis zoo: nyiam nyob ib leeg dua li nrog lwm tus neeg, kev zam txim, xav tau kev sib raug zoo, tsis nyiam noj soma, tsis ua menyuam yaus thiab nyiam kev txawj ntse stimulants