By Babu G. Ranganathan
How does that bright yellow blob in a chicken egg turn into little bones, beak, eyes, ears, brain, heart, nerves, arteries, muscles, lungs, legs, and everything else that makes up a live, breathing, cute, and cuddly chicken?
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| DNA helps egg yolks turn into chickens |
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Don't we eat eggs for food? You can fry an egg, boil an egg, scramble an egg, but how can a living, breathing, cuddly baby chicken come from that same egg! We must understand a little about DNA works. When a hen's egg is fertilized by a rooster then that egg possess a complete set of DNA (genetic instructions) from its parents. When you understand how your DNA gave you your body you'll also understand how DNA can turn an egg yolk into a chicken.
The subject of DNA is very much in the headlines and news but very few have bothered to learn or understand just how this amazing molecule works and how it makes us what we are from head to toe. Haven't you ever asked yourself how you got your nose, eyes, ears, fingers, toes, and everything else? How did your DNA bring all this about? Before we answer that question we need to know just a few simple things about DNA. DNA is the abbreviated name for the genetic code and it is exactly that - a code. It is a sequential molecular string of chemical information.
DNA is located in the nucleus of our cells and is made up of various smaller molecules called nucleic acids. These various smaller molecules in our DNA are arranged in an exact sequence, just like the various letters found in a sentence. The sequence of these nucleic acids tells the cells in our body how to build our nose, eyes, hands, feet, and everything else. If the sequence for something isn't there our bodies won't build it!
The material our body used to build our nose, eyes, ears, brain, and all of our other tissues, organs and structures, and the material our body uses daily to build new cells to replace the ones that are dying comes from the food we eat. Food is not just for energy. Food is also the "lumber" and "bricks" the body uses to build new cells. When a cell multiplies it makes more cells of the same size. The only way to do this is by getting new material and that new material comes from food.
Think about it! When we were in our mother's womb we started off as a single cell not even weighing an ounce at conception. Eventually we developed arms, hands, legs, feet and organs such as brain, heart, lungs, liver, stomach, until we had a complete body. It's true that the single cell we once were multiplied into many more cells, but where did the material come from for that one cell to multiply into billions of more cells of equal size and eventually making a body weighing several pounds from something that didn't even weigh an ounce in the beginning. The material came from our mother's food.
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