Mention DNA to your friends or relatives, and they probably won’t say, “What’s that?” We have become intimately familiar with our genes, using them to provide us with clues to our ancestry or gauge our risk of developing certain diseases. DNA sequencing is getting so cheap that some researchers foresee a time not far in the future when everyone will get their genome sequenced. But how much do you really know about genetics and how it affects our lives? Take this quiz to find out.
Mea culpa: An earlier version of this quiz incorrectly stated that only boys get color blindness. In fact, girls can get color blindness as well, although such cases are much more rare. According to the National Eye Institute, 0.5 percent of women with Northern European ancestry have the common form of red-green color blindness.