Qhov sib txawv tseem ceeb ntawm micronucleus thiab macronucleus yog tias micronucleus yog lub hauv paus me me uas muaj cov kab mob genome ntawm ciliate protozoans thaum macronucleus yog cov nucleus loj tshaj plaws, muaj cov genome somatic ntawm ciliate protozoans.
Nuclear dimorphism yog qhov tshwm sim ntawm muaj ob hom nuclei sib txawv hauv tib lub cell. Nws yog ib tug tshwj xeeb yam ntxwv tam sim no nyob rau hauv protozoan ciliates thiab ib co foraminifera. Ob lub nuclei no yog macronucleus thiab micronucleus. Lawv muaj cais genomes. Lub macronucleus yog qhov loj dua uas tswj cov metabolism ntawm ciliate protozoa thaum micronucleus yog qhov me dua uas ua rau kev ua me nyuam thiab tsim cov macronucleus.
Micronucleus yog dab tsi?
Micronucleus yog lub hauv paus me me tawm ntawm ob lub nuclei pom hauv ciliate protozoans. Nws muaj cov germline genetic khoom ntawm lub cev. Li no, nws tswj cov kev ua haujlwm ntawm cov menyuam yaus.
Daim duab 01: Nuclear Dimorphism
Ntxiv mus, cov kab mob no tsis tuaj yeem rov tsim dua yam tsis muaj micronucleus. Yog li, micronucleus yog lub luag haujlwm rau cov caj ces reorganization uas tshwm sim thaum lub sij hawm conjugation los yog cross-fertilization. Tsis tas li ntawd xwb, tab sis micronucleus tseem ua rau nce mus rau macronucleus. Txawm li cas los xij, genome ntawm micronucleus yog transcriptionally ntsiag to. Ntxiv rau cov no, micronucleus muaj qhov sib piv me me ntawm DNA.
YMacronucleus yog dab tsi?
Lub macronucleus yog lub nucleus loj dua nyob hauv ciliate protozoa. Nws muaj somatic genome uas muaj cov ntaub ntawv keeb kwm ntawm lub cev. Piv rau micronucleus, macronucleus muaj ntau dua DNA ntawm ntau pua mus rau txhiab chromosomes.
Daim duab 02: Macronucleus
DNA hauv macronucleus tswj cov metabolism hauv lub cev. Yog li ntawd, nws yog qhov chaw nruab nrab ntawm cov haujlwm metabolic ntawm lub cev. Qhov tseeb, macronucleus yog lub luag haujlwm rau kev ua haujlwm ntawm tes. Yog li, nws yog lub hauv paus tsis muaj kev sib txuas ntawm ciliate protozoa. Ntxiv mus, macronucleus yog ellipsoidal nyob rau hauv cov duab, thiab nws yog active nyob rau hauv transcription. Macronucleus disintegrates thaum lub sij hawm conjugation. Tab sis, nws hloov kho los ntawm micronucleus los ntawm karyogamy.
Dab tsi zoo sib xws ntawm Micronucleus thiab Macronucleus?
- Ciliate protozoans muaj ob qho tib si micronucleus thiab macronucleus.
- Ob leeg nyob hauv tib lub cytoplasm.
- Thiab, lawv muaj cais genomes.
- Vim li no, lawv ob tus lej rau cov ntaub ntawv keeb kwm ntawm lub cev.
- Yog li, ob lub nuclei tseem ceeb sib npaug rau kev ciaj sia ntawm lub cev.
- Ntxiv mus, lawv tswj cov txheej txheem ntawm tes.
- Qhov tseem ceeb tshaj plaws, cov micronucleus ua rau cov macronucleus.
Qhov txawv ntawm Micronucleus thiab Macronucleus yog dab tsi?
Ciliates muaj ob lub nuclei li micronucleus thiab macronucleus. Micronucleus yog lub nucleus me me thiab cov noob caj noob ces. Hauv qhov sib piv, macronucleus yog qhov loj dua thiab cov nucleus uas tsis yog menyuam yaus. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm micronucleus thiab macronucleus. Micronucleus genome yog diploid thaum macronucleus genome yog polyploidy. Ntxiv mus, micronucleus muaj me me ntawm DNA, thaum macronucleus muaj ntau DNA. Yog li, qhov no kuj yog qhov sib txawv ntawm micronucleus thiab macronucleus.
Cov lus qhia hauv qab no qhia txog qhov sib txawv ntawm micronucleus thiab macronucleus.
Summary – Micronucleus vs Macronucleus
Ciliates yog ib leeg-hlwb eukaryotic kab mob uas qhia pom muaj nuclear dimorphism. Lawv muaj micronucleus thiab macronucleus. Micronucleus yog lub cev xeeb tub uas muaj cov kab mob genome tseem ceeb rau kev yug me nyuam. Nyob rau hauv sib piv, macronucleus yog lub non-reproductive nucleus uas muaj somatic genome tseem ceeb rau tag nrho cov metabolic thiab ib txwm ua hauj lwm ntawm lub cev. Tsis tas li ntawd, macronucleus muaj qhov sib piv ntau ntawm DNA piv rau micronucleus. Yog li, qhov no qhia txog qhov sib txawv ntawm micronucleus thiab macronucleus.
