Genetics Foundations

3 sessions, in order

Three sessions, one straight line: what a gene physically is, then two places that idea immediately pays off. First, DNA itself: a twisted ladder built from four letters that only pair in fixed combinations, which turns out to be the entire reason copying it is even possible. Then, why you have the eye color you have, traced back to one specific instruction inherited from each parent. And last, why isolated animals on the other side of the world end up solving the same survival problems in strikingly similar ways, evolution running the same experiment twice. Genetics starts here, then goes exactly where you'd expect.