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Recombinant DNA, genetically engineered DNA prepared in vitro by cutting up DNA molecules and splicing together specific DNA fragments; usually uses DNA from more than one species of organism.  

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Recombinant DNA, genetically engineered DNA prepared in vitro by cutting up DNA molecules and splicing together specific DNA fragments; usually uses DNA from more than one species of organism Genetic Engineering Genetics: Genetic Research After Mendel DNA Carries Heredity Every living system has a blueprint for replication, or making copies of itself. This blueprint is commonly called heredity. The key structure of the hereditary process is the long, spiral DNA molecule. DNA consists of two complementary strands coiled around each other to form a twisting ladder called a double helix (see Genetics). The strands are made up of varying sequences of chemical groups which are called nucleotides. A nucleotide consists of a sugar and a phosphate group plus either of two purine bases--adenine (A) and guanine (G)--or either of two pyrimidine bases--thymine (T) and cytosine (C). DNA contains the genetic code for making proteins from smaller molecules called amino...

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