Rabbit Color Genetics Calculator
### Lagomorph Genetics & The 5 Coat Color Loci Domestic rabbit coat color genetics follows classical Mendelian inheritance across 5 primary independent gene loci recognized by the American Rabbit.
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📐 Formula
💡 Practical Example
Breeding a dominant Chestnut Agouti buck (A B C D E) with a Self Black doe (a B C D E): All F1 offspring display the agouti banded wild coat while carrying hidden recessive self genes.
📖 About Rabbit Color Genetics Calculator
Lagomorph Genetics & The 5 Coat Color Loci
Domestic rabbit coat color genetics follows classical Mendelian inheritance across 5 primary independent gene loci recognized by the American Rabbit Breeders Association (ARBA).
The 5 Core Genetic Loci
- A-Locus (Agouti Series):
- A: Agouti (dominant banded hairs, white belly, e.g. Chestnut, Opal, Chinchilla).
- a^t: Tan / Otter / Marten (tan belly and eye circles).
- a: Self (recessive solid body color with zero banding, e.g. Black, Blue, Chocolate).
- B-Locus (Base Color):
- B: Black base eumelanin (dominant).
- b: Chocolate brown base pigment (recessive).
- C-Locus:
- C: Full color (dominant).
- c^chd: Dark Chinchilla.
- c^h: Himalayan (temperature-sensitive points on nose, ears, feet).
- c: Ruby-Eyed White.
- D-Locus (Dilution Series):
- D: Dense intense pigmentation (dominant Black or Chocolate).
- d: Dilute pigment (recessive Blue from Black, Lilac from Chocolate).
- E-Locus (Extension Series):
- E: Normal extension of dark pigment.
- e^j: Japanese / Harlequin alternating brindle pattern.
- e: Non-extension (removes dark pigment from body, creating Tortoise, Orange, or Fawn).
How to Use This Calculator
Enter your Buck (Sire): A-Locus (Pattern) — choose from A - Agouti (Rings / White Belly / Wild Type), at - Tan / Otter / Marten Pattern, a - Self (Solid Color / No Bands), Buck (Sire): B-Locus (Base Color) — choose from B - Black Base Pigment, b - Chocolate / Brown Base Pigment, Buck (Sire): C-Locus (Color Shading) — choose from C - Full Color, cchd - Chinchilla (Dark Shaded / Silver), ch - Himalayan / Pointed White, Buck (Sire): D-Locus (Density / Dilution) — choose from D - Dense Pigment (Black, Chocolate), d - Dilute Pigment (Blue, Lilac), Buck (Sire): E-Locus (Extension) — choose from E - Normal Extension (Full Body Color), ej - Japanese / Harlequin Brindle, e - Non-Extension (Tortoise, Fawn, Orange), Doe (Dam): A-Locus (Pattern) — choose from A - Agouti (Rings / White Belly), at - Tan / Otter / Marten Pattern, a - Self (Solid Color), Doe (Dam): B-Locus (Base Color) — choose from B - Black Base Pigment, b - Chocolate / Brown Base Pigment, Doe (Dam): C-Locus (Color Shading) — choose from C - Full Color, cchd - Chinchilla, ch - Himalayan / Pointed White, Doe (Dam): D-Locus (Density / Dilution) — choose from D - Dense Pigment, d - Dilute Pigment, and Doe (Dam): E-Locus (Extension) — choose from E - Normal Extension, ej - Japanese / Harlequin, e - Non-Extension (Tort / Orange). Results update instantly as you type — adjust any value to compare scenarios.
The Formula
Formula Reference: Rabbit Color Genetics Calculator
Input variables:
buckGeneA — Buck (Sire): A-Locus (Pattern)
buckGeneB — Buck (Sire): B-Locus (Base Color)
buckGeneC — Buck (Sire): C-Locus (Color Shading)
buckGeneD — Buck (Sire): D-Locus (Density / Dilution)
buckGeneE — Buck (Sire): E-Locus (Extension)
Computed outputs:
buckPhenotypeName — Buck (Sire) Color Phenotype
doePhenotypeName — Doe (Dam) Color Phenotype
offspringProbableColors — Predicted Kit Coat Varieties
basePigmentType — Primary Base Pigment
Standard: NIST / ISO mathematical definitions
Worked Example
Breeding a dominant Chestnut Agouti buck (A B C D E) with a Self Black doe (a B C D E): All F1 offspring display the agouti banded wild coat while carrying hidden recessive self genes.
Understanding Your Result
Evaluate your result in the context of your specific use case and relevant industry standards or reference values. A single calculated result is a starting point — test two to three scenarios to understand how sensitive the outcome is to your key input assumptions. For high-stakes decisions, verify your result against a secondary source or subject-matter expert before acting.
💡 Mathematical Rigor & Applied Context
- This calculator applies exact mathematical definitions following conventions established by NIST and international standards bodies.
- Rounding errors accumulate across multi-step calculations. For precision-critical work, maintain extra significant figures through all intermediate steps.
- Many mathematical concepts have multiple valid formulations — if a result seems unexpected, verify which convention or definition applies to your context.
- Dimensional analysis (unit tracking) is the fastest way to catch formula errors. Every term in an equation must have consistent, compatible units.
- Numerical methods used in digital calculators introduce floating-point precision limits (~15 significant digits for IEEE 754 double precision).
- For statistical and probabilistic calculations, always specify whether you are working with population parameters or sample statistics — formulas differ.
- Visualizing a problem geometrically or testing with known boundary values (zero, infinity, negative) reveals hidden errors faster than algebraic checking.
- When in doubt, validate your result against a simplified hand calculation or a published worked example from a textbook or standards document.
Results are for informational and educational purposes only. Always verify critical decisions with a qualified professional.