They make up the "rungs" of the twisted DNA ladder.
What are the bases Adenine, Thymine , Cytosine, and Guanine?
The base that is not found in DNA.
What is Uracil?
Scientists use biological and chemical methods to change the arrangement of DNA that makes a gene.
What is Genetic Engineering?
The rule for how nitrogen bases match up in DNA.
DNA from one organism is placed into another species. (Ex: Insulin gene inserted into the DNA of bacteria.)
What is Recombinant DNA technology?
The "X" shaped structure that is composed of tightly wound DNA.
What is a chromosome?
The old process used to improve crop plants and domestic animals, by breeding organisms with the desired traits.
What is a selective breeding?
The number of chromosomes humans have.
What is 46?