The Discovery That Connected Genes to Evolution

Two Great Ideas, One Big Connection: Darwin explained how evolution happens, but it took genetics to reveal why it works at the molecular level.
From Traits to DNA: Early biologists realized that genes—the units of heredity—are the raw material evolution acts upon.
Mutation Fuels Change: Small, random changes in genes create new traits, giving natural selection something to work with.
The Modern Evolutionary Synthesis: In the 1930s and 1940s, scientists merged Darwin’s theory with Mendel’s genetics—uniting evolution and inheritance.
Evolution in the Code: DNA mutations, passed from parent to offspring, gradually transform species over time.
The Power of Population Genetics: Mathematical models showed how gene frequencies shift across generations—evolution quantified in numbers.
Natural Selection’s Partner: Selection doesn’t create new genes; it filters the variations that mutations provide.
A Revolution in Biology: This union of genetics and evolution turned biology into a single, unified science of life.
DNA as the Evidence: Modern genome studies directly trace evolutionary paths once only imagined by Darwin.
One Story of Change: From genes to ecosystems, every level of life now fits into the same elegant framework: evolution powered by genetics.