Part 1 of 5 · freeIntroduction
People knew that traits pass from parents to children. But what chemical object carries the information? In the middle of the 20th century, the answer came into focus: DNA.
In 1953, James Watson and Francis Crick published a famous model, the double helix. That shape explains how DNA can copy itself.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2Finding the carrier of heredity
- 3The photograph that changed everything
- 4Why the double helix matters
- 5Modern biology starts here
Open-book quiz8 questions whose answers are in the text.
Glossary6 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
