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It's often meaningless to talk about a genetic trait without also discussing the environment in which that trait appears. Sometimes, genes don't work at all until the environment awakens them.

Through the evolutionary process, those who are able to engage in social cooperation of various sorts do better in survival and reproduction.

One of the things that got me interested in genetics was the relationship between genes and environment. We are all dealt a certain deck of cards, but our environment can influence the outcomes.

The reason for natural selection's great success is that it provides a satisfying explanation of how evolution might have occurred: individual organisms vary, and if those variations are inherited, the successful ones will survive and propagate and pass down their desirable traits to succeeding generations.

Animals have genes for altruism, and those genes have been selected in the evolution of many creatures because of the advantage they confer for the continuing survival of the species.

For me, the level at which natural selection causes the phenomenon of adaptation is the level of the replicator - the gene.

Evolution is an indispensable component of any satisfying explanation of our psychology.

The interaction of the variation in our genes is what's responsible for lots of our attributes and vigor.

The urgency to mate persists in all people as in all other mammals because of the evolutionary drive to continue the species, the inborn imperative for genes to reproduce and hormonal differences that evolved over millions of years.

The more that I looked at DNA, the more I realized it was nature and nurture. It's how genes and your environment work together to produce the person you are.