Video: Dab tsi yog chromosomes rau ib tug txiv neej ib txwm muaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Poj niam muaj ob daim ntawv theej X chromosome , thaum txiv neej muaj ib tug X thiab ib tug Y chromosome. 22 autosomes yog suav nrog qhov loj me. Lwm ob chromosome, X thiab Y, yog cov chromosomes kev sib deev. Daim duab no ntawm tib neeg chromosomes lined ua khub yog hu ua karyotype.
Tom qab ntawd, dab tsi chromosomes rau ib tug txiv neej?
Txiv neej muaj ib tug Y chromosome thiab ib tug X chromosome, thaum poj niam muaj ob X chromosomes. Hauv cov tsiaj txhu, cov Y chromosome muaj cov noob, SRY, uas ua rau kev loj hlob ntawm embryonic li txiv neej. Y chromosomes ntawm tib neeg thiab lwm hom tsiaj kuj muaj lwm cov noob uas xav tau rau kev tsim cov phev.
Kuj Paub, dab tsi chromosomes rau poj niam? Tib neeg muaj ib khub ntxiv kev sib deev chromosomes rau tag nrho ntawm 46 chromosomes. Cov kev sib deev chromosomes raug hu ua X thiab Y , thiab lawv cov kev sib xyaw ua ke txiav txim siab tus neeg sib deev. Feem ntau, tib neeg poj niam muaj ob X chromosomes thaum txiv neej muaj XY ua khub.
Qhov thib ob, dab tsi yog qhov chromosome muaj pes tsawg leeg ntawm tib neeg cov txiv neej quizlet?
Cov tib neeg karyotypes muaj 22 khub ntawm autosomal chromosomes thiab 1 khub deev chromosomes (allosomes). Ib txwm karyotypes rau cov poj niam muaj ob X chromosomes thiab yog 46, XX; cov txiv neej muaj X thiab Y chromosome npe 46,x.
Tib neeg muaj pes tsawg chromatids?
92 chromatid ua
Pom zoo:
Cov txiv neej thiab poj niam muaj pes tsawg tus X thiab Y chromosomes?
Cov poj niam muaj ob daim qauv ntawm X chromosome, thaum txiv neej muaj ib qho X thiab ib qho Y chromosome. 22 autosomes yog suav nrog qhov loj me. Lwm ob chromosomes, X thiab Y, yog kev sib deev chromosomes. Daim duab no ntawm tib neeg chromosomes lined ua khub yog hu ua karyotype
Muaj pes tsawg tus txiv neej tsim cov ntsiab lus muaj nyob rau hauv lub rooj zaum?
Cov khoom siv hluavtaws yog cov uas muaj atomic tooj 95-118, raws li pom hauv ntshav ntawm lub rooj sib tham nrog: cov 24 lub ntsiab lus no tau tsim thawj zaug thaum xyoo 1944 thiab 2010
Yuav ua li cas tshwm sim thaum tus txiv neej dig muag xim yuav ib tug poj niam ib txwm?
X qhia txog kev sib deev-txuas ntxiv cov noob rau xim dig muag. Yog hais tias tus txiv neej dig muag xim 0(Y) yuav poj niam ib txwm (XX), nyob rau hauv F1 tiam tag nrho cov txiv neej progeny (cov tub) yuav zoo li qub (XY). Cov poj niam progeny (cov ntxhais) tab sis yuav pom cov phenotype ib txwm, tab sis genetically lawv yuav heterozygous (XX)
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
Cov txiv neej puas muaj X lossis Y chromosomes?
No. ntawm noob: 63 (CCDS)