Incomplete dominance produces a new heterozygous phenotype such as the purple color in this example
DNA is coiled into proteins,,,,which makes up ur DNA (about 6,400,000,000 basepairs (DNA building blocks) that make up your DNA) basically...and...The way DNA is packaged into chromatin is a factor in how protein production is controlled. so in your nucleus....AGAIN....DNA IS KEPT OR COILED AROUND PROTEIN YET KEPT IN UR NUCLEUS... :)
... i hope this helps somewhat..
For many species, there are often regional differences in their genes, although most of the time this differences aren't noticeable in their outward appearance.