The two German Shepherds shown above were born from the same litter. One has long fur and the other has regular length fur. These dogs have different traits for their fur length because _
their DNA and RNA created different numbers of proteins that now create more fur than the previous gene.
their RNA mutated to form a new gene variation that created the variation in fur.
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their DNA has different arrangements of nucleotides that code for the protein RNA creates
their DNA and RNA have different types of sugars that create the protein for the fur.