What is DNA?
Your Body's Special Instruction Book
Imagine you had a book that contained every single instruction needed to build you, from the color of your eyes to the shape of your ears, from your hair color to your blood type. That book is real, and it's called DNA.
DNA stands for deoxyribonucleic acid, but you can think of it as your personal instruction manual. It lives inside almost every cell in your body, and it tells each cell exactly what to do and when to do it.
The most amazing part
Your complete DNA instruction book was finished at the very moment you began, Day 1, the moment of fertilization. Before your first heartbeat, before your first brain wave, before anything else, the entire blueprint for building you was already complete.
Amazing DNA facts
3 billion letters
Your DNA instruction book is about 3 billion letters long, and you carry two copies, one from each parent. If you printed it all out, it would make a stack of books taller than a 10-story building!
Completely unique
Your exact mix of DNA is brand new. Even identical twins, who start with the same DNA, grow up different.
Your starting instructions
Your DNA guides your eye color, hair color and much more, and it was all there from Day 1. How you live and grow shapes the rest.
23 + 23 = you
You received 23 chromosomes from your mom and 23 from your dad. Together, these 46 chromosomes make the complete instruction book that is uniquely you.
Complete from the start
Your DNA instruction book wasn't built gradually. It was complete from the very first moment of fertilization.
Even twins are different
Even identical twins, who share the same DNA, develop different fingerprints! Your body takes the instructions and makes them uniquely yours.
Want to see when your DNA instruction book was completed?
Calculate Your Alive Date