Question: Which of these DOES NOT represent new genetic variation upon which selection could act? Need Assignment Help? A point mutation that leads to a modified triplet code while keeping the encoded amino acid unchanged. A point mutation in a duplicated gene that results in a new trait for that species. A base is deleted from the original DNA sequence, changing the amino acid and resulting in variation of a protein unique to this species. The insertion of two bases into a DNA sequence leads to the encoding of a different amino acid, resulting in the variation of an enzyme specific to this species.