This pairing gives you 66.7% Italian / Manchurian gold and 33.3% Pharaoh (wild-type brown). About 25% of the fertile eggs will not hatch — those embryos inherited Yellow from both parents — so the percentages are of the chicks that actually live.
| Chick looks like | Carries, but does not show | Egg shell (hens) | Share of hatch |
|---|---|---|---|
| Italian / Manchurian gold | — | Normal | 66.7% |
| Pharaoh (wild-type brown) | — | Normal | 33.3% |
The Yellow gene is homozygous-lethal: chicks that inherit it from both parents die in the shell. About 25% of the fertile eggs from this pairing will not hatch, every time, no matter how good your temperature and humidity are. Pairing a gold bird to a Pharaoh instead avoids the loss entirely.
Yellow
| Y | y+ | |
|---|---|---|
| Y | Y/Y | Y/y+ |
| y+ | Y/y+ | y+/y+ |
Yellow: Dominant and homozygous-lethal. One copy gives the gold Italian / Manchurian look; chicks that inherit it from both parents die in the shell, so every living gold bird carries exactly one copy.
Yellow heterozygote. No living Italian is homozygous, because double-Yellow embryos die in the shell.
Italian is built on the Yellow (Y) mutation, and here's the rule: Yellow is homozygous-lethal. Chicks that inherit Yellow from both parents die in the shell, so every living Italian is heterozygous. Italian × Italian hatches run about 25% smaller than expected (the lost double-Yellows) and throw ~1 in 3 Pharaoh-colored chicks. Italian × Pharaoh gives you roughly half of each with no losses — the smarter pairing.
Full Italian (Fawn) guide →Need a trait that is not a named variety? Use the full genetics calculator to set alleles directly for recessive, dominant, incomplete-dominant and sex-linked traits.
Quail Keeper Max stores every bird's variety and celadon status, builds 4-generation pedigrees, and predicts the hatch from your actual pairings — so the invisible carriers in your covey stop being invisible.
See Breeding & Genetics →