Rabbit Color Calculator

An expert tool to predict the phenotype and genotype outcomes of a rabbit breeding pair.

Sire (Father) Genotype

Dam (Mother) Genotype

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Detailed Genetic Breakdown

The following table shows all possible genotypes from this pairing, their resulting phenotypes (visual color), and the statistical probability of their occurrence.

Phenotype (Color)	Genotype	Probability

What is a Rabbit Color Calculator?

A rabbit color calculator is a specialized genetic tool used by breeders and enthusiasts to predict the potential offspring from a specific pairing of two rabbits (a sire and a dam). Unlike a simple color mixer, this calculator uses the principles of genetics, specifically the known gene loci that control coat color in rabbits, to forecast the probability of different colors and patterns appearing in a litter. It helps breeders make informed decisions to achieve specific color goals or to understand the hidden genetic traits their rabbits might carry.

This tool is invaluable for anyone serious about breeding rabbits, as it demystifies why certain colors appear and how to work towards producing new, desirable variations. It is a powerful application of the Punnett square method across multiple gene series simultaneously.

Rabbit Color Genetics: The Formula Explained

Rabbit color is not determined by a single factor but by a combination of genes, each located on a specific locus. Our rabbit color calculator focuses on the five primary and most impactful gene series. A rabbit inherits one allele (gene variant) from each parent for every locus. Dominant alleles will be expressed visually over recessive ones.

The final color (phenotype) is a result of the interaction between these genotypes:

Core Genetic Variables in Rabbit Color

Variable (Locus)	Meaning	Allele Dominance Hierarchy	Typical Range of Expression
A	Agouti Series	A > at > a	Controls the pattern on the hair shaft (banded vs. solid).
B	Black/Brown Series	B > b	Determines if the base pigment is black or brown (chocolate).
C	Color Series	C > cchd > cchl > ch > c	Controls the overall expression and intensity of pigment.
D	Dense/Dilute Series	D > d	Determines if the color is dense (dark) or dilute (faded).
E	Extension Series	E > e	Controls the extension of dark pigment. The ‘e’ allele creates red/yellow colors.

Practical Examples

Example 1: Breeding Two Black Rabbits

Let’s see what happens when we breed two seemingly identical black rabbits. One is a pure black, and the other carries dilute and self-recessive genes.

• Sire Inputs: aa BB CC Dd EE
• Dam Inputs: aa Bb CC Dd Ee
• Expected Results: The litter could surprisingly produce not just Black kits, but also Blue, Orange, and Fawn, because both parents carried hidden recessive genes. This is why a rabbit color calculator is so useful.

Example 2: Chestnut Agouti x REW

This demonstrates how a dominant color can mask recessive traits.

• Sire Inputs (Chestnut): AA BB CC DD EE
• Dam Inputs (Ruby-Eyed White): aa bb cc dd ee
• Results: All offspring (100%) will be Chestnut Agouti (phenotype). However, their genotype will be Aa Bb Cc Dd Ee. They are all carriers for chocolate, REW, dilute, and non-extension, which can appear in the next generation. For more information on complex pairings, check out our guide on {related_keywords}.

How to Use This Rabbit Color Calculator

1. Select Sire Genotype: In the “Sire (Father) Genotype” column, use the dropdown menus to select the known genotype for each of the five gene loci (A, B, C, D, E). If you are unsure, you may need to perform test breedings or consult a genetics chart.
2. Select Dam Genotype: Repeat the process for the “Dam (Mother) Genotype” column.
3. Calculate: Click the “Calculate Possible Colors” button.
4. Review Results: The calculator will display the results below. You’ll see a chart of the most likely phenotypes and a detailed table showing all possible genotype combinations, their corresponding visual colors, and the percentage chance of each appearing in the litter.
5. Interpret: Use this data to plan your breedings. Understanding which kits carry which genes is crucial for a successful breeding program. Exploring our {related_keywords} article can provide deeper insights.

Key Factors That Affect Rabbit Color

While the five main gene series form the foundation, other factors can influence a rabbit’s final appearance. This rabbit color calculator provides a strong baseline, but consider these additional elements:

• Wide Band Gene: This gene widens the intermediate band on an agouti hair shaft, creating richer colors like reds and creams.
• Rufous Factors: These are multiple, unmapped genes that control the richness of red/yellow pigment. High rufous factors lead to a deep, vibrant red, while low factors result in a pale fawn.
• Vienna Gene (v): Responsible for Blue-Eyed White (BEW) rabbits and Vienna Marked (VM) rabbits. This gene is separate from the ‘c’ (REW) and ‘d’ (blue) genes.
• Dutch, Harlequin, and other Spotting Genes: These control where color appears on the body, creating distinct patterns. Our guide to {related_keywords} covers some of these.
• Silvering/Shading Genes: Genes like Si (Silvering) introduce white hairs throughout the coat, creating a silvered look. The C-locus alleles also create shading, as seen in Sable or Seal rabbits.
• Modifier Genes: A vast category of genes that can subtly tweak a color, making it lighter, darker, richer, or duller. These are often what separate a good-quality color from a show-winning one. Our post on {related_keywords} touches on this.

Frequently Asked Questions (FAQ)

1. What’s the difference between genotype and phenotype?

A rabbit’s genotype is its actual genetic code (e.g., ‘Aa Bb Cc Dd Ee’). The phenotype is the physical expression of those genes—the color you see (e.g., ‘Chestnut’).

2. How accurate is this rabbit color calculator?

For the five basic gene series, this calculator is highly accurate based on the laws of Mendelian genetics. However, actual litter results can vary due to random chance. The percentages represent the statistical probability over many litters, not a guarantee for a single one.

3. Why isn’t my rabbit’s color in the calculator?

Your rabbit might have a color influenced by genes not included in this basic calculator, such as the Vienna gene (for Blue-Eyed Whites) or specific spotting patterns. This tool covers the vast majority of standard colors.

4. What does “carrying” a gene mean?

A rabbit “carries” a gene if it has a recessive allele in its genotype that is not visible in its phenotype. For example, a black rabbit with the genotype ‘Bb’ is phenotypically black but carries the recessive gene for chocolate (‘b’).

5. Can I get a blue rabbit from two black rabbits?

Yes, if both black rabbits carry the dilute gene (‘d’). If a ‘Dd’ sire is bred to a ‘Dd’ dam, there is a 25% chance of producing a ‘dd’ (blue) offspring.

6. What is a REW rabbit?

REW stands for Ruby-Eyed White. It is caused by the homozygous recessive genotype ‘cc’ at the C-locus, which prevents any color pigment from being produced.

7. Can I use this calculator for other animals?

No, this rabbit color calculator is calibrated specifically for the genetic loci found in domestic rabbits. Other species have different sets of genes controlling their coat color.

8. Where can I learn more advanced genetics?

Many university agricultural extension websites and national breeder associations have great resources. Our internal article on {related_keywords} is a good starting point.