Yellow Common Wall Lizard
peer reviewedBCO2recessive
How it inherits
- One copy
- One copy shows nothing at all. The animal looks ordinary and is called a carrier, or “het”.
- Two copies
- Two copies, one from each parent, are needed before it appears.
Yellow carrier × Yellow carrier
Four ways the two can meet.
1 in 4het Yellow
1 in 4het Yellow
1 in 4Yellow
1 in 4Normal
- het Yellow50%
- Yellow25%
- Normal25%
A pale box is an animal that shows the morph. These are the odds for each egg on its own, not a promise about a clutch.
What this rests on
A peer-reviewed paper identifies the variant behind this morph in the gene BCO2.
- Regulatory changes in pterin and carotenoid genes underlie balanced color polymorphisms in the wall lizard. — Proc Natl Acad Sci U S A 2019
- Pterin-based pigmentation in animals. — Biol Lett 2021
- Physiological phenotypes differ among color morphs in introduced common wall lizards (Podarcis muralis). — Integr Zool 2024
- The role of historical biogeography in shaping colour morph diversity in the common wall lizard. — Mol Ecol 2024
- Colour morphs as alternative solutions to the trade-off predicted by the immuno-competence handicap hypothesis. — Integr Zool 2025
What happens if you breed it
Every pairing involving Yellow, worked out gene by gene — including what the clutch can be and anything documented about the animals it produces.