Video: Puas yog homologous chromosomes muaj tib lub noob?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib chromosome ntawm txhua tus homologous khub los ntawm niam (hu ua niam chromosome ) thiab ib tug los ntawm leej txiv (paternal chromsosome). Homologous chromosomes zoo ib yam tab sis tsis yog zoo ib yam . Txhua tus nqa lub tib cov noob hauv ib yam kev txiav txim, tab sis cov alleles rau txhua qhov zoo yuav tsis yog ib yam.
Kuj paub, vim li cas homologous chromosomes muaj tib tus lej ntawm cov noob?
Qhov 22 khub ntawm homologous chromosomes muaj cov tib cov noob tab sis txoj cai sib txawv ntawm lawv cov ntaub ntawv allelic txij thaum ib tug tau txais los ntawm leej niam thiab ib tug los ntawm leej txiv. Yog li ntawd tib neeg muaj ob homologous chromosome teev nyob rau hauv txhua lub cell, txhais tau tias tib neeg yog cov kab mob diploid.
Ib yam li ntawd, homologous chromosomes txawv li cas? Ob tug mej zeej ntawm a homologous chromosome txawv los ntawm ib leeg vim lawv muaj cov qauv sib txawv ntawm tib lub noob, hu ua alleles.
Ntawm no, puas yog homologous chromosomes nyob hauv mitosis?
Homologous chromosomes yog tam sim no hauv ob qho tib si mob mitosis thiab meiosis , tab sis lawv tsis tsim khub hauv mob mitosis . Es lawv yuav tsim homologous chromosome khub thaum meiosis , uas tso cai rau kev hla mus tshwm sim.
Dab tsi yog qhov txawv ntawm homologous thiab nonhomologous chromosomes?
Lub ntsiab Qhov sib txawv ntawm homologous thiab non-homologous chromosomes yog tias homologous chromosomes muaj alleles ntawm tib hom noob hauv tib loci whereas non-homologous chromosomes muaj cov alleles ntawm txawv hom noob caj noob ces.
Pom zoo:
Dab tsi yog txhais los ntawm cov noob tseem ceeb thiab cov noob caj noob ces?
(Nyob rau hauv cov ntsiab lus ntawm caj ces, ib qho tseem ceeb tshaj plaws yog ib qho uas yog phenotypically qhia hauv heterozygotes). Ib qho tseem ceeb tshaj plaws yog tawm tsam qhov tsis zoo uas tshwm sim tsuas yog thaum muaj ob daim ntawv theej ntawm cov noob. (Nyob rau hauv cov ntsiab lus genetic, ib tug recessive zoo yog ib tug uas yog phenotypically qhia tsuas yog nyob rau hauv homozygotes)
Dab tsi yog qhov txawv ntawm chromosomes chromatids thiab homologous chromosomes?
Nws yog ib qho tseem ceeb kom nco ntsoov qhov sib txawv ntawm tus muam chromatids thiab homologous chromosomes. Sister chromatids yog siv nyob rau hauv cell division, zoo li nyob rau hauv lub cell hloov, whereas homologous chromosomes yog siv nyob rau hauv reproductive faib, zoo li ua ib tug neeg tshiab. Sister chromatids yog genetic tib yam
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