Simple Genetics Calculator

A practical planning guide for Heritage Clearwing pairings. Choose a common project bird such as Amethyst, Cobalt, Goldentop, Green series, Mauve, Olive, Rainbow, Red Violet, Seafoam or Violet, or enter the visible traits and known splits manually, then press calculate. The expanded results explain not only the percentages, but also what each result means, how sex-linked traits work, and what to record in the aviary.

Important: The project-bird presets are starting points only. After selecting Amethyst, Cobalt, Goldentop, Green series, Mauve, Olive, Rainbow, Red Violet, Seafoam or Violet, adjust the fields if your bird is different. Opaline and Cinnamon are sex-linked. Hen chicks receive their single Z chromosome from the cock bird. This calculator keeps that rule separate from the autosomal traits.

Cock Bird Common project bird

Choose a common project bird to pre-fill the fields, then adjust any known splits or differences below.

Base colour / dark factor Violet factor Clearwing Whitecap Goldenface (Goldentop) Cinnamon Opaline Fallow Dilute Pied

Hen Bird Common project bird

Choose a common project bird to pre-fill the fields, then adjust any known splits or differences below.

Base colour / dark factor Violet factor Clearwing Whitecap Goldenface (Goldentop) Cinnamon Opaline Fallow Dilute Pied

Expected Results

Choose the parent traits above and press Calculate Pairing. The result will include percentages, plain-English explanations, breeder notes, and record-keeping reminders.

How to Read the Calculator Results

Percentages are estimates

A 25% result does not mean every clutch of four will show one chick of that type. It means each chick has that chance when the parents are entered correctly.

Unknown splits change everything

If a parent is split for Clearwing, Opaline, Cinnamon, Fallow, Dilute or blue, the real nest results can be different. Use Unknown when you are not sure and update records when chicks prove a hidden trait.

Sex-linked traits must be read by sex

Opaline and Cinnamon are sex-linked. Daughters depend heavily on what the cock bird carries or shows, while sons can carry hidden splits from either side depending on the pairing.

Use results as a planning guide

The calculator helps plan pairings, but real breeding records are stronger evidence. Compare the result with ring numbers, photos, hatch notes and chick colours before changing labels on parent birds.

Record tip: When a chick proves a hidden split in a parent, update the parent record from suspected or unknown to proven. Do not rely on photos alone for hidden traits.

How to use this calculator

Use known facts only

Select Unknown when you are not sure. A hidden split can completely change nest results.

Track every chick

Use the result as a planning guide, then compare it against your clutch records and leg-band notes.

Check sex-linked traits carefully

For Opaline and Cinnamon, daughters can only show the trait when the cock bird passes it to them.

Use presets as shortcuts

The Amethyst, Cobalt, Goldentop, Green series, Mauve, Olive, Rainbow, Red Violet, Seafoam and Violet presets fill the main fields quickly, but you should still adjust splits and unknowns to match your own bird.

Session Pairing History

The last 5 pairings you calculated this session. Click any entry to reload those results.

No pairings calculated yet this session.