You've probably heard of the X and Y chromosomes, but did you know that humans have 22 others? Learn why and how our DNA is organized into these large structures.
This video is part of the Bio-Dictionary for "The Explorer's Guide to Biology" (XBio for short), which is a bold re-imagining of the biology textbook for the 21st century. Visit explorebiology.org for free content that focuses on stories of scientific discovery.
