Waa maxay dib-u-habaynta hidda-socodka ee bayoolaji?
Waa maxay dib-u-habaynta hidda-socodka ee bayoolaji?
Anonim

Dib-u-habaynta hiddaha (sidoo kale loo yaqaan hidde isku shaandhayn) waa beddelka hidde walxo udhaxeeya noole kala duwan taaso u horseeda soosaar farac leh sifooyin isku dhafan oo ka duwan kuwa laga helo labada waalid.

Iyadoo la tixgelinayo tan, waa maxay dib-u-habaynta bayoloji?

Dib-u-habaynta meiosis. Dib-u-habayn waa hab ay qaybo DNA-da ka mid ah u jabaan oo dib la isugu keeno si loo soo saaro isku-dar cusub oo alleles ah. Tani dib-u-habayn Nidaamku wuxuu abuuraa kala duwanaansho hidde-siyeedka heerka hidde-sideyaasha taasoo ka tarjumaysa kala duwanaanshaha taxanaha DNA ee noole kala duwan.

Intaa waxaa dheer, waa maxay habka dib-u-habaynta hidde-sideyaasha? Dib-u-habaynta hiddaha waa kakan habka taas oo ku lug leh isku toosinta laba qaybood oo DNA ah oo isku mid ah, jebinta saxda ah ee xadhig kasta, isweydaarsiga siman ee qaybaha DNA ee u dhexeeya labada qaybood, iyo xidhitaanka natiijada dib-u-habaynta DNA-da iyada oo loo marayo ficilka enzymes ee loo yaqaan 'ligases'.

Waxa kale oo laga yaabaa in la is weydiiyo, waa maxay tusaale ahaan dib-u-habaynta hidda-socodka?

Guud ama qaniis dib-u-habayn Waxay ku dhacdaa inta u dhaxaysa molecules DNA ee isku xiga, sida koromosoomyada isku midka ah ee noolaha diploid. Wacan tusaaleyaal waa nidaamyada is dhexgalka bakteeriyada qaar, sida l, ee koromosoomyada bakteeriyada iyo dib u habeynta immunoglobulin hiddo-sideyaasha xoolaha laf dhabarta.

Waa maxay 3da hab ee dib-u-habaynta hidde-sideyaasha?

Si kastaba ha ahaatee, bakteeriyada ayaa la helay siyaabo si ay u kordhiyaan hidde kala duwanaansho loo marayo saddex farsamooyinka dib-u-habaynta: beddelka, isbeddelka iyo isku-xidhka.

Mawduuca caan ku ah