![]() Genes are packaged into tightly wound lengths of DNA called chromosomes. The bases pair in a specific way across the two strands of the helix: adenine pairs with thymine, and cytosine pairs with guanine. The four bases are adenine (A), guanine (G), cytosine (C), and thymine (T). Each strand of DNA is made of four types of molecules, also called bases, attached to a sugar-phosphate backbone. It is the remaining 1% that explains much of what makes you, you!ĭNA is arranged like two intertwined ropes, in a structure called a double helix (see figure 1). Even so, over 99% of DNA sequences are the same among all people. Your DNA is the most unique and identifying factor about you-it helps determine what color your eyes are, how tall you are, and how likely you are to have certain health problems. Proteins drive important body functions, like digesting food, building cells, and moving your muscles. ![]() The information in your DNA gives your cells instructions for producing proteins. Humans and all other living things have DNA, which contains hereditary information. Genetics Engagement & Education NetworkĭNA: The Body’s Instruction Manual Figure 1: wikicommons.Genetics Basics: Six Things You Should Know.Human Genetics and Genomics Advances (HGG Advances).The American Journal of Human Genetics (AJHG).Exhibit & Poster Hall: Your Solutions Hub.
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