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Transcript
How can a four "letter" code provide information that determines many, many different traits? Because when you put the four letters in different orders they are different every time. What is the relationship between a DNA "word" and "sentence"? When you put DNA letters/sentences into words they make sense All of our genes are made of DNA. What makes one gene different from another? Because each gene is a building block for each part of your body. One gene might tell how to move your legs; one might tell how to move your arms. If each of our cells contains the same DNA, why is a liver cell different from a nerve cell? Because a liver cell tell the body how to work the liver and a nerve cell tells how to work a nerve and how to take care if a nerve. Why are most human traits not inherited in the simple manner depicted for the hitchhiker's thumb? Because their parents might not have this trait.
