Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: 1900 ya nuna abin da ake kira sake gano Mendel: Hugo de Vries, Carl Correns, da Erich von Tschermak sun isa ga dokokin Mendel (wanda ba a cikin aikin Mendel ba). Ba da daɗewa ba bayan haka, masana kimiyyar ƙwayoyin cuta suka ce ƙwayoyin halittar jini ne ke sa mutum ya gāji wani abu. Tsakanin 1910 da 1915, Thomas Hunt Morgan da "Drosophilists" a cikin dakin gwaje-gwajensa sun ƙirƙira waɗannan ra'ayoyin biyu - duka masu rikitarwa - a cikin "Mendelian-chromosome theory" na gado. Sun ƙididdige abin da ya faru na haɗin kwayar halitta kuma sun yi iƙirarin cewa kwayoyin halitta suna zaune a kan chromosomes kamar beads a kan kirtani; sun yi tunanin ƙetare don bayyana haɗin kai da kuma gina taswirar kwayoyin halittar ƙwayar 'ya'yan itace Drosophila melanogaster, wanda ya zama nau'in kwayoyin halitta da aka yi amfani da shi sosai. Hugo de Vries ya yi ƙoƙarin haɗa sabon kwayoyin halitta tare da juyin halitta; gina aikinsa tare da gado da haɗuwa, ya ba da shawarar ka'idar juyin halitta, wanda aka yarda da shi a farkon karni na 20. Lamarckism, ko ka'idar gadon halaye da aka samu kuma tana da magoya baya da yawa. An ga Darwiniyanci ba ya jituwa da halaye masu canzawa na ci gaba da nazarin masu nazarin halittu, wanda ya zama kamar kawai an sami gado ne kawai. A cikin 1920s da 1930s - biyo bayan yarda da ka'idar Mendelian-chromosome theory - fitowar horo na ilimin halittar yawan jama'a, tare da aikin RA Fisher, JBS Haldane da Sewall Wright, sun haɗa ra'ayin juyin halitta ta hanyar zabin halitta tare da ilimin halittar Mendelian, suna samar da haɗin zamani. An ƙi gadon halayen da aka samu, yayin da juyin halitta ya ba da hanya yayin da ka'idodin kwayoyin halitta suka balaga. A rabi na biyu na karni an fara amfani da ra'ayoyin ilimin halittar yawan jama'a a cikin sabon horo na ilimin halittar hali, ilimin zamantakewa, kuma, musamman a cikin mutane, ilimin juyin halitta. A cikin shekarun 1960s W.D. Hamilton da sauransu sun haɓaka ka'idodin ka'idar wasa don bayyana rashin son kai daga hangen nesa ta hanyar zaɓi na dangi. Tushen yiwuwar halittu mafi girma ta hanyar endosymbiosis, da bambanci...  Tambaya: Mene ne iyaye suke ba 'ya'yansu?
ƙwayoyin halitta