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The instructions for the traits of an organism are determined by:

the proportions of A, T, C, and G in DNA molecules
the order of nucleotides in DNA molecules
the length of DNA molecules
the way nucleotides are paired in the two strands of a DNA molecule

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Kalani569

Answer:

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). ...

Most of the cells in a human contain two copies of each of 22 different chromosomes. ...

Changes in DNA (mutations) occur spontaneously at low rates.

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