Which theory helps us understand why various species differ from one another,tells us to what diseases we are predisposed,and enables us to produce drugs for a variety of diseases?

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The gene theory explains that genes are units of heredity in the form of DNA,and they control the structure and function of cells and organisms by encoding proteins.This enables us to compare the DNA of different organisms and see how they are related.We can examine human DNA to see how certain genes are associated with diseases.And,DNA technology can be used to produce drugs such as the insulin used to treat diabetes.

Which Theory Helps Us Understand Why Various Species Differ from One