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Table of Contents What is DNA? DNA, or deoxyribonucleic acid, is a long chain of molecules that dictates the functions of a cell. The molecules that make up DNA are called nucleotides. A nucleotide includes one of four bases: adenine (A), guanine (G), thymine (T), and cytosine (C). Nucleotides with complementary bases pair with each …
Twins can be identical or non-identical. Since identical twins look the same, does that mean their DNA is too?
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