Turquoise Parakeet · Neophema Pulchella

Mutation Guides

A plain-language guide to every mutation this calculator models — what it is, how it is inherited, and what each genotype actually looks like.

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Sex-linked mutations

These sit on the Z chromosome. Cocks (ZZ) can carry them invisibly as splits; hens (ZW) cannot — a hen is either wild-type or visual.

Opaline Sex-linked recessive~4 min Redistributes melanin pattern rather than removing it, brightening the head and back. Cinnamon Sex-linked recessive~4 min Lightens dark eumelanin to a warm brown, leaving the green and turquoise intact. Ino (Lutino) Sex-linked recessive~4 min Removes nearly all melanin, producing a bright yellow bird with red or pink eyes.

Autosomal recessive mutations

Two copies are needed to show. One copy makes an invisible split carrier. Cocks and hens inherit these identically.

Dilute Autosomal recessive~3 min Thins melanin across the whole bird for a softer, washed-out version of the normal pattern. Fallow Autosomal recessiveRed-eyed~3 min Red-eyed mutation that lightens black eumelanin; tracked separately from Dun Fallow. Dun Fallow Autosomal recessiveRed-eyed~4 min Red-eyed, shifting black toward greyish brown. Its status as a distinct Turquoisine mutation is unsettled. Faded Autosomal recessive~4 min Lightens overall pigmentation. This is the mutation the old name “Isabel” refers to in this species. Recessive Pied Autosomal recessive~3 min Symmetrical patches of clear, unpigmented feathering that vary from bird to bird.

Dominant & incomplete dominant mutations

Always visible if carried — there is no hidden split state. With incomplete dominance, one copy and two copies look different from each other.

Dark Factor Incomplete dominant~3 min Bright Green → Dark Green → Olive as copies are added. Always visible, never split. Grey Dominant~3 min Single and double factor look identical, but zygosity still changes the odds for every chick. Violet Factor Incomplete dominant~3 min Shifts the blue component toward violet. Stacks with the Dark Factor series. Red Suffusion DominantApproximate~4 min A selection trait, not settled genetics. “Red-fronted” and “Red-bellied” are two names for it, not two grades.

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