Yog ob leeg ntawm gametes tau diploid, lub zygote tsim yuav ces muaj plaub pawg chromosomes yog li nws yuav yog tetraploid es tsis txhob diploid.
Yuav ua li cas yog gametes tau diploid?
Gametes yog tsim los ntawm meiosis uas tsim cov hlwb nrog n=23 es tsis txhob diploid hlwb. Yog tias gametes raug tsim los ntawm mitosis txhua gamete yuav be diploid tsis haploid. Thaum lub sij hawm fertilization ntawm diploid gametes, lub zygote yuav dhau los ua 4n=92. Nrog rau txhua tiam tshiab tus naj npawb ntawm chromosomes yuav ob npaug.
Gametes puas tuaj yeem ua tau diploid?
Lawv kuj raug hu ua kev sib deev hlwb. Poj niam gametes hu ua ova lossis qe hlwb, thiab txiv neej gametes hu ua phev. Gametes yog cov hlwb haploid, thiab txhua lub cell tsuas yog ib daim qauv ntawm txhua tus chromosome. … Thaum lub sij hawm fertilization, ib tug spermatozoon thiab ovum koom ua ke los tsim ib tug tshiab diploid kab mob.
Yuav ua li cas yog tias ob lub hlwb yog diploid?
Diploid piav qhia lub xovtooj ntawm muaj ob daim ntawv theej ntawm txhua tus chromosome. Yuav luag tag nrho cov hlwb hauv tib neeg lub cev muaj ob homologous, lossis zoo sib xws, luam ntawm txhua chromosome. Qhov tsuas yog qhov tshwj xeeb yog cov hlwb hauv kab kab mob, uas mus rau tsim gametes, lossis qe thiab phev hlwb.
Yuav ua li cas yog tias txiv neej thiab poj niam gametes tau diploid?
Yog hais tias gametes ntawm txiv neej thiab poj niam tau diploid ces cov zygote tsim tom qab fusion yuav muaj ob npaug ntawm cov chromosomes ntawm gamete. Qhov no txhais tau tias lub zygote yuav muaj cuaj caum-ob chromosomes. Hauv lwm lo lus, nws yuav yog tetraploid.
