Lub xovtooj twg yog triploid hauv cov nroj tsuag angiosperm?

Cov txheej txheem:

Lub xovtooj twg yog triploid hauv cov nroj tsuag angiosperm?
Lub xovtooj twg yog triploid hauv cov nroj tsuag angiosperm?
Anonim

Hauv angiosperms, zygote yog diploid thaum lub primary endosperm cell yog triploid.

Dab tsi yog triploid nyob rau hauv ib txwm angiosperm?

Kwv yees li 70% ntawm hom angiosperm muaj cov hlwb endosperm uas yog polyploid. Cov no feem ntau yog triploid (muaj peb pawg chromosomes), tab sis tuaj yeem sib txawv ntawm diploid (2n) txog 15n.

Yuav ua li cas triploid tsim hauv cov nroj tsuag angiosperm?

Ob lub phev nuclei thiab lub qe nucleus fused rau hauv zygotic nucleus hauv polyspermic zygote, thiab triploid zygote faib ua ob-celled embryo ntawm mitotic division nrog ib tug raug bipolar microtubule spindle. Ob-celled proembryo tau tsim thiab rov tsim dua tshiab rau hauv cov nroj tsuag triploid.

Qhov twg hauv qab no yog triploid?

Yog li, cov lus teb yog 'Maize endosperm. '

Lub cell twg yog diploid hauv angiosperms?

Ib tug phev nucleus fuses nrog lub qe nucleus hauv qe cell los ua ib tug diploid (2n) zygote uas loj hlob mus rau hauv lub embryo ntawm cov noob.

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