This is how we see so many shades of eye color in our dogs and not just one shade of brown and one shade of blue. (thehappypuppysite.com)
You and your opponent would try to guess which character each other selected by confirming various features such as eye color, hair, hats, glasses, and more. (cintell.net)
Imagine that say you shook someone's hand and you got their genes for eye color, [all] of a sudden your eyes went from brown to blue. (scientificamerican.com)