Video: Yuav ua li cas inversions suppress recombination?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho tseem ceeb evolutionary nyhuv ntawm inversions yog lawv suppress kev sib raug zoo raws li heterozygotes (Daim duab 2). Txhaum ua raws los ntawm kev poob ntawm qhov tsis sib npaug gametes uas tshwm sim los ntawm recombination (Lub Thawv 1), qhov tsis ua tiav ntawm thaj chaw inverted rau synapse nyob rau hauv heterozygotes, thiab tej zaum lwm yam mechanisms tseem tsis tau to taub.
Dhau li ntawm no, ua li cas chromosome inversions tshwm sim?
Ib kev hloov pauv yog a chromosome rearrangement nyob rau hauv uas ib ntu ntawm a chromosome yog thim rov qab kawg rau kawg. Ib inversion tshwm sim thaum ib leeg chromosome undergos breakage thiab rearrangement nyob rau hauv nws tus kheej. Inversions yog Ntawm ob hom: paracentric thiab pericentric.
Kuj Paub, inversion heterozygote yog dab tsi? r·zh?n 'hed·?·r?'zī'gōt] (genetics) Ib hom kab mob diploid uas ib tus tswv cuab ntawm ib khub ntawm homologous chromosomes muaj rov qab gene sequence thiab lwm yam muaj cov gene sequence.
Hais txog qhov no, chromosomal inversions cuam tshuam li cas ntawm kev hloov caj ces?
Chromosomal inversions yog dav xav rau tau txais kev nyiam los ntawm kev xaiv ntuj vim lawv txwv kev sib koom ua ke ntawm alleles uas muaj zog dua rau tib yam caj ces keeb kwm yav dhau los yog nyob rau hauv ib puag ncig zoo sib xws. Txawm li cas los xij, ob peb xaiv alleles tau ua tus yam ntxwv ntawm qib molecular.
Dab tsi yog qhov txawv ntawm Pericentric thiab Paracentric inversion?
Paracentric inversion tsis suav nrog centromere, thiab ob qho tib si tawg hauv ib arm ntawm lub sijhawm chromosome pericentric inversion suav nrog lub centromere, thiab muaj qhov tawg hauv txhua caj npab.
Pom zoo:
Dab tsi yog genetic recombination hauv biology?
Genetic recombination (tseem hu ua genetic reshuffling) yog kev sib pauv ntawm cov khoom siv caj ces ntawm cov kab mob sib txawv uas ua rau muaj cov xeeb ntxwv nrog kev sib txuas ntawm cov yam ntxwv sib txawv ntawm cov uas pom hauv niam txiv
Yuav ua li cas koj txiav txim siab npaum li cas ntawm cov kua qaub uas yuav tsum tau neutralize lub hauv paus?
Kev daws qhov teeb meem Acid-Base Neutralization Kauj Ruam 1: Muab xam cov moles ntawm OH-. Molarity = moles / ntim. moles = Molarity x Volume. moles OH- = 0.02 M/100 milliliters. Kauj ruam 2: Xam qhov ntim ntawm HCl xav tau. Molarity = moles / ntim. Volume = moles/molarity. Volume = moles H+/0.075 Molarity
Yuav ua li cas yog vim li cas vim li cas lub epigenome hloov?
Kev ua neej nyob thiab ib puag ncig (xws li kev haus luam yeeb, noj zaub mov thiab kab mob sib kis) tuaj yeem ua rau tus neeg muaj kev ntxhov siab uas ua rau muaj tshuaj lom neeg. Cov lus teb no, dhau los, feem ntau ua rau muaj kev hloov pauv hauv epigenome, qee qhov tuaj yeem ua rau puas tsuaj
Yuav ua li cas yog cov structural units uas ua ionic compounds thiab yuav ua li cas lawv hu ua?
Rau binary ionic compounds (ionic compounds uas muaj tsuas yog ob hom ntawm cov ntsiab lus), cov tebchaw muaj npe los ntawm kev sau lub npe ntawm cov cation ua ntej tom qab lub npe ntawm anion. Piv txwv li, KCl, ib qho ionic compound uas muaj K + thiab Cl-ions, yog lub npe hu ua potassium chloride
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