Science 101: Evolution and Genes

Last year, New York City's 4th and 8th graders scored below both the state and national averages on a nationwide science exam. Just 13% of eighth-graders were deemed proficient in science on the National Assessment of Educational Progress. Every day over the next week, we'll take a few minutes to get to the bottom of some common science questions.

Our Science expert is Rob DeSalle, curator in the Sackler Institute for Comparative Genomics at the American Museum of Natural History.

Today: Evolution and genes