Black and Blue Crested Geckos: What the Genetics Actually Say
Dark and "blue" crested geckos are trending, but they're not separate morphs. Learn the polygenic genetics behind dark crested geckos and why pairings rarely breed true.
TL;DR: Dark and "black" crested geckos are not a proven recessive or incomplete-dominant morph, they are polygenic combinations of melanin expression, base color, and firing state. Q: Is there a real black crested gecko morph? A: No proven single-gene "black" morph exists in crested geckos. Dark animals are the result of polygenic melanin expression and base color, combined with the fired-up state. The effect can be dramatic in photos but does not breed true like a proven morph such as Lilly White or Axanthic.
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