One time a teenager said to me, "I can't figure out who I am!" My response was "you are you!" That might sound funny but its true. You are uniquely you. On the outside you look like you and on the inside you have more than 100 trillion cells. Those cells contain all of the genes and all of the information necessary to make a human being. Most of that information is found in the control center of each cell called the nucleus.
Each nucleus stores its genetic information in chromosomes. Most of us have 46 chromosomes in each of our cells. Half of these come from our mom and the other half come from our dad. Each one of these chromosomes is made up of genes that contain information that other parts of the cell use to make proteins. Without proteins our bodies can't work the way God designed them to.
Genes are made up of strands of different lengths that are called DNA. DNA contains four chemicals that work together to make up you.
You're right if you think that all of this is complicated! Each cell is unique and
so detailed that scientists who study cells (cell biologists) are amazed at the beauty and make up of just one cell.
Just one human cell is pretty incredible-- you have more than 100 trillion of them in your body!!! How did all of these cells come into existence? The Bible makes it clear that God as the author of life not only designed your cells, He designed you! In Jeremiah 1:5 God told the prophet Jeremiah, "Before I formed you in the womb I knew you." David tells us that God designed him in Psalm 139:13, "For You formed my inward parts; You covered me in my mother's womb." You are uniquely you! God designed you just the way He wants you to be. The next time you wonder who you are remember, you are uniquely designed to be you by the Creator of the universe!
For more information about the cell, DNA and genes check out Dr. Georgia Purdom at http://www.answersingenesis.org/home/area/bios/g_purdom.asp.