Industrial AgeScience & Math Genes on chromosomes 1910Major Thomas Hunt Morgan's fruit fly work ties a trait to a specific chromosome. His lab goes on to map genes along chromosomes. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → Habitual fire and cooking → Homo sapiens appears → Complex language → Natufian villages → Oldest known bread → Agriculture begins → Irrigation → Uruk and the first cities → Cylinder seals → Writing (cuneiform) → Babylonian mathematics → Babylonian astronomical diaries → Thales and natural philosophy → Trial and death of Socrates → Plato's Academy → Aristotle's Lyceum → Alexander's conquests → Death of Alexander and the Hellenistic kingdoms → Seleucid Empire founded → Parthian Empire founded → Sasanian Empire → Birth of Muhammad → Muhammad's first revelations → The Hijra → Conquest of Mecca → Death of Muhammad and the Rashidun caliphate → Arab conquests → Abbasid Caliphate → Battle of Talas → Paper reaches the Islamic world → House of Wisdom → Ibn al-Haytham's Book of Optics → Bacon's Novum Organum → Royal Society → Linnaean classification → Mendel's laws of inheritance → Mendel rediscovered → Genes on chromosomes Community notesLoading notes… Learn more ranked by votesDocumentnobelprize.orgThomas H. Morgan, Nobel Prize in Physiology or Medicine 1933 (NobelPrize.org) ↗Editor's pickBookRobert E. KohlerLords of the Fly: Drosophila Genetics and the Experimental Life ↗Editor's pickVideoSearch on YouTubeThomas Hunt Morgan fruit fly experiment ↗Editor's pickVideoSearch on YouTubeMorgan white eyed fly sex linkage ↗Editor's pick