Twins can look identical. And siblings or children may look similar to other people in their family. Even kittens can have the same markings as other kittens in a litter. But why? The answer is DNA. DNA is what makes family members look similar but also makes them unique. DNA is what makes you, well, you! Provided by publisher.

Includes index.

Blueprint for life -- Understanding DNA -- It's all in the genes -- Organizing DNA -- Steps forward -- Looking ahead -- Think like a scientist.