Human Neandertal mtDNA tree.
Mutations are the grist of evolution, and have accumulated in our DNA over time. When populations separate, each group accumulates their own unique set of DNA mutations.
A single DNA nucleotide undergoes a "point" mutation, changing an A to a T.
The three models of DNA replication - semi-conservative, conservative, and dispersive - and whether bias played a role in designing/interpreting the experiment.
Mutations in our DNA can be used to trace the relationships between different populations and species.
How Meselson came to read the Watson and Crick paper, then think about ways to experimentally test how DNA replicates.
Why DNA was probably not the driving force of molecular evolution in a pre-biotic environment.
Some mutations are starting points for evolution, others are responsible for disease.
Comparison of genetic diversity in humans and chimpanzees, using sequences from 811 humans and 332 chimps.
James Watson talks abput repetitve elements, junk DNA, transposons, and compartative genomics.