Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Sake haɗuwa yana ba da damar chromosomes don musayar bayanin kwayoyin halitta da kuma samar da sababbin nau'ikan kwayoyin halitta, wanda ke kara yawan zabin yanayi kuma yana da mahimmanci a cikin saurin juyin halitta na sababbin sunadarai. Hakanan kwayar halitta na iya shiga cikin gyaran DNA, musamman a cikin amsawar kwayar halitta ga rabuwa da igiya biyu. Mafi yawan nau'in giciye na chromosomal shine sake haɗuwa da homologous, inda chromosomes guda biyu da ke da hannu suna raba jerin abubuwa masu kama da juna. Sake haɗuwa da ba daidai ba na iya cutar da ƙwayoyin cuta, saboda yana iya haifar da sauye-sauyen chromosomal da halayen kwayoyin halitta. Ana yin amfani da halayen sake haɗuwa ta hanyar enzymes da aka sani da recombinases, kamar RAD51. Mataki na farko a cikin sake haɗuwa shine fashewar zaren guda biyu wanda ya haifar da endonuclease ko lalacewar DNA. Jerin matakai da aka haɓaka a wani ɓangare ta hanyar sake haɗawa sannan ya haifar da haɗuwa da helices guda biyu ta hanyar akalla haɗin Holliday ɗaya, wanda wani ɓangaren zaren guda ɗaya a cikin kowane helix an annealed zuwa zaren mai dacewa a cikin sauran helix. Haɗin Holliday shine tsarin haɗin haɗin tetrahedral wanda za'a iya motsawa tare da nau'i na chromosomes, musayar wani layi don wani. Ana dakatar da aikin sake haɗuwa ta hanyar tsagewar mahaɗin da sake haɗin DNA da aka saki. Sai kawai igiyoyi masu kama da polarity suna musayar DNA yayin sake haɗuwa. Akwai nau'ikan rarrabuwa guda biyu: rarrabuwa gabas zuwa yamma da rarrabuwa arewa zuwa kudu. Rabuwa ta arewa zuwa kudu ta yanke igiyoyin DNA guda biyu, yayin da rabuwa ta gabas zuwa yamma tana da igiya daya ta DNA. Kirkirar mahaɗan Holliday yayin sake haɗuwa yana ba da damar bambancin kwayar halitta, kwayar halitta don musayar a kan chromosomes, da kuma bayyanar da nau'in kwayar halittar kwayar halitta.  Tambaya: Menene ya dakatar da amsawar?
tsagewar mahaɗin da sake haɗawa