| NSES Content Standard C
Life Science: The molecular basis of heredity Grades 9-12, page 185 In all organisms, the instructions for specifying the characteristics
of the organism are carried in DNA, a large polymer formed from subunits
of four kinds (A,G,C, and T). The chemical and structural properties of
DNA explain how the genetic information that underlies heredity is both
encoded in genes (as a string of molecular "letters") and replicated (by
a templating mechanism). Each DNA molecule in a cell forms a single chromosome.
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Benchmark 5B The Living Environment:
Heredity
Grades 9-12, page 109
Genes are segments of DNA molecules. Inserting, deleting, or substituting
DNA segments can alter genes. An altered gene may be passed on to every
cell that develops from it. The resulting features may help, harm, or have
little or no effect on the offspring's success in its environment.
Benchmark 5C The Living Environment:
Cells
Grades 9-12, page 114
The genetic information in DNA molecules provides instructions for
assembling protein molecules. The code used is virtually the same for all
life forms.