Genetics are a big part of it, like you would expect, but its a bit more nuanced than what we learned in high school biology.

Eye color is a complex genetic trait determined by pairings of genes passed on from each parent. Scientists once believed eye color was determined by a single gene, but advances in genetic research ...

INDIANAPOLIS - An international team, led by scientists from the School of Science at IUPUI and Erasmus MC University Medical Center Rotterdam in the Netherlands, has developed a novel tool to ...

DNA traits are the genetic codes that explain why you look, think, and even behave in certain ways. Each of us has a unique combination of genes that constitute our genetic blueprint. The DNA ...