He explores the relationship between the biological traits and the cultures of five civilizations.

How could this be, if language evolved like any other biological trait?

Ornamentation is a common biological trait seen in birds.

Certain cultural and biological traits made Native Americans more susceptible to these diseases.

Women's biological traits, such as their ability to get pregnant, are often used against them as an attribute of weakness.

McCrae believes that personality is a biological trait, first and foremost.

Their maleficium is often seen as a biological trait or an acquired skill.

His research interest focuses on the connection between biology, evolution and culture in determining the expression of biological traits.

For every interesting biological trait some naturalist will try to think of an adaptationist explanation.

Gene mapping is the process of determining the locus for a particular biological trait.