The ancestral return phenomenon refers to a less normal biological "degeneration" phenomenon. Existing organisms occasionally appear to inherit some of the traits of their ancestors. Therefore, the ancestral return phenomenon can also be used as evidence of biological evolution. research value. which is not a return to the ancestral phenomenon? ['Some newborns will have short tails or whole body hair.', 'Domestic ducks sometimes have a duck that can fly short distances.', 'Bengal tiger occasionally produces a breed of white with pure white hair, which is called white tiger.', 'Double-winged insect hind wings have degenerated into balance bars, but occasionally individuals with two pairs of wings appear.']