Rabbit Color Calculator - Predict Baby Bunny Coat Colors
Use this rabbit color calculator to predict the most likely baby bunny coat colors from the sire and dam genotypes at the A, B, C, D, and E color loci.
Rabbit Color Calculator
Results
What Is Rabbit Color Calculator?
A rabbit color calculator is a Mendelian genetics tool that combines a sire's and a dam's genotypes at the five main rabbit coat color loci (A, B, C, D, and E) and lists the possible baby bunny coat colors with their probabilities.
- • Planning a breeding pair: Check the most likely baby color and the probability spread before pairing a sire and a dam.
- • Predicting a surprise litter: Work out which coat colors can show up in an existing pair's litter, including hidden recessive colors carried by parents.
- • Explaining carry colors to a buyer: Show a new owner why two visually black rabbits can produce a chestnut baby.
- • Genetics homework and 4-H projects: Use the calculator as a hands-on Punnett-square trainer for students learning Mendelian inheritance.
The calculator reads one allele pair from each parent at each locus, builds a Punnett cross at every locus, and multiplies the per-locus probabilities across all five loci to return a ranked list of every distinct 5-locus offspring genotype that is possible.
Once you know what color the litter will be, Rabbit Cage Size Calculator helps you size the hutch for the new babies before they arrive.
How Rabbit Color Calculator Works
The calculator treats each of the five coat color loci as an independent Mendelian trait and multiplies the per-locus Punnett probabilities across all five loci. A is dominant over a, B over b, C over c, D over d, and E over e.
- A locus (Agouti vs Self): A (banded hair shaft) is dominant over a (solid self coat). A_ produces chestnut, opal, lynx, cinnamon, orange, or fawn; aa produces a solid self coat such as black, chocolate, blue, or lilac.
- B locus (Black vs Brown): B (black eumelanin) is dominant over b (chocolate phaeomelanin). B_ gives black-based pigment; bb gives chocolate-based pigment.
- C locus (Color expression): C is dominant over c. cc removes all pigment and produces a red-eyed white albino.
- D locus (Dense vs Dilute): D is dominant over d. dd dilutes black to blue and chocolate to lilac.
- E locus (Extension vs Non-extension): E is dominant over e. ee turns a self rabbit into a tortoiseshell and an agouti rabbit into an orange or fawn.
Two chestnut agouti rabbits (Aa Bb Cc Dd Ee x Aa Bb Cc Dd Ee)
Sire: Aa Bb Cc Dd Ee. Dam: Aa Bb Cc Dd Ee.
At each locus, an Aa x Aa cross gives 25% AA, 50% Aa, 25% aa. The most likely joint offspring genotype is Aa Bb Cc Dd Ee with probability 0.5^5 = 0.03125 (about 3.13%). The cross produces 243 distinct 5-locus genotype combinations in total.
Most likely baby color: Chestnut Agouti (A_ B_ C_ D_ E_), about 3.13% per genotype.
According to Omni Calculator rabbit color calculator, the algorithm combines the sire's and dam's genes at the five main color loci (A, B, C, D, E) and lists the possible offspring color and genotype combinations with their probabilities.
According to Wikipedia domestic rabbit article, a rabbit's coat has either two pigments (pheomelanin for yellow and eumelanin for dark brown) or no pigment for an albino rabbit.
If you want to step from a single cross up to a population-level Hardy-Weinberg view, Allele Frequency Calculator uses the same allele notation to estimate carrier frequency in a herd.
Key Concepts Explained
These four ideas shape the formula and explain why the offspring colors turn out the way they do.
Dominance and recessiveness at every locus
Each locus has a dominant allele (capital) and a recessive allele (lowercase). AA and Aa both look like the dominant phenotype, so a rabbit that looks chestnut can still be hiding a recessive a allele that may show up in the litter.
Independent assortment across the five loci
The five loci sit on different chromosomes, so they inherit independently. The joint probability is the product of the five per-locus probabilities, which is why a single cross can produce dozens of baby colors at once.
Phenotype versus genotype
The phenotype is the color you can see; the genotype is the full pair of letters at every locus. Two black self rabbits (aa B_ C_ D_ E_) can hide b, c, d, and e alleles and produce several other colors in their litter.
Hide-and-seek of the C locus (albino)
cc turns off pigment entirely. A Cc carrier looks like a normal colored rabbit but can throw red-eyed white (albino) kits when paired with another Cc or cc mate, which is why the C locus is often called the albino locus.
These four rules work together: a 2x2 Punnett square per locus, multiplied across all five loci, then sorted by probability.
Per-animal trait math is also how livestock planning counts individuals, and Cattle Per Acre Calculator applies the same head-count thinking to pasture stocking.
How to Use This Calculator
Pick the genotype pair for the sire and the dam at each locus, then read the most likely baby color and the top offspring combinations.
- 1 Read the sire genotype: For each of the five loci, choose the allele pair the sire carries. If you only know the sire's color, pick the genotype that matches.
- 2 Read the dam genotype: Do the same for the dam. Two agouti parents that look the same color can still carry hidden recessives.
- 3 Set unknown loci to heterozygous: If you do not know what a parent carries at one locus, leave the calculator default (Aa, Bb, Cc, Dd, Ee).
- 4 Read the most likely baby color: The first result is the human-readable phenotype name for the highest-probability genotype.
- 5 Read the top three offspring genotypes: The next results show the second and third most likely 5-locus genotypes and their probabilities.
- 6 Check the distinct offspring count: The last result shows how many distinct 5-locus genotype combinations are possible from this cross.
For a sire that is Aa Bb Cc Dd Ee and a dam that is aa BB Cc DD Ee, the most likely baby is a chestnut agouti carrier of self at about 3.13%, with black self and black tortoiseshell combinations as the next most likely outcomes.
When a small-mammal litter is on the way, Guinea Pig Age Calculator helps you read the age in weeks for a new baby once it arrives.
Benefits of Using This Calculator
A predicted baby color is more useful when it comes with a probability and a list of carry colors. These benefits show up when the calculator is used early in the breeding plan.
- • See hidden carry colors: The cross-multiplication across the five loci surfaces recessives that neither parent shows.
- • Plan breedings for a target color: Switch the sire and dam genotypes and watch the most likely baby color change in real time.
- • Teach Mendelian inheritance visually: A live cross across five loci is a much faster way to show how independent assortment and dominance work.
- • Spot inbreeding of color genes: If the same two parents keep producing the same single color, the calculator shows that the parents are homozygous at one or more loci.
- • Estimate the color spread of a litter: The distinct-offspring-count output shows how many different 5-locus genotypes are possible.
Because the calculator returns the top three genotypes and the total count, you can read both the most likely baby color and the realistic color spread in a single calculation.
For a multi-pet household, Cat BMI Calculator pairs nicely with the rabbit color check to keep a cat's body condition in range alongside any breeding plan.
Factors That Affect Your Results
The Punnett cross gives a probability, but a real litter is shaped by the parents' actual genotypes, the litter size, and which other loci the breeder is tracking.
Hidden recessives in the parents
Two parents that look the same color can carry different recessives. Two chestnut agouti rabbits that both look A_ B_ C_ D_ E_ can be Aa Bb Cc Dd Ee or Aa Bb CC DD Ee, and the cross will give a very different baby color distribution.
Additional color loci
The five main loci cover most of the recognized coat colors, but Steel, Harlequin, Broken, Vienna, Dutch, Silvering, Wideband, and Lutino loci add more variation. Turning them on multiplies the number of possible combinations.
Litter size versus probability
A 25 percent probability does not mean exactly one kit in four. A litter of three or four can come out all the same color or split into all four colors by chance, and the calculator reports the long-run probability.
Sex-linked and temperature-sensitive effects
Himalayan and pointed rabbits are temperature-sensitive: the cooler points (ears, nose, feet, tail) develop color while the warmer body stays pale. This effect is not modeled in the simplified calculator.
- • The calculator uses a simplified two-allele C locus (C vs c) and does not distinguish chinchilla, sable, and himalayan separately.
- • The probability is the long-run statistical average, not a promise for any one litter.
- • Steel, harlequin, broken, Vienna, Dutch, silvering, wideband, and lutino are not part of the five-locus model.
Treat the calculator's most likely baby color as a planning estimate. Watch the actual litter colors and update the parents' genotype records for the next pairing.
According to the American Rabbit Breeders Association, the ARBA Standard of Perfection recognises 52 domestic rabbit breeds and is the national registry for rabbit coat colours and show classifications in the United States.
For a small-animal household where body condition also matters, Dog BMI Calculator gives a parallel body-condition read for the dog in the same home.
Frequently Asked Questions
Q: What is the rabbit color calculator used for?
A: The rabbit color calculator combines a sire's and a dam's genotypes at the five main coat color loci (A, B, C, D, and E) and lists the possible baby bunny coat colors with their probabilities. It is built for breeding planning, surprise-litter prediction, and Mendelian genetics teaching.
Q: How do you predict baby rabbit colors?
A: Pick the allele pair the sire carries at each of the five loci, do the same for the dam, and let the calculator run a 2x2 Punnett cross at every locus. Multiply the per-locus probabilities across all five loci, sort the joint distribution, and read the most likely 5-locus offspring genotype as the predicted baby color.
Q: What do the five rabbit color gene groups do?
A: The A locus decides agouti banding versus a solid self coat. The B locus decides black versus chocolate pigment. The C locus decides whether pigment is expressed at all, with cc producing a red-eyed white albino. The D locus decides dense versus dilute, with dd diluting black to blue and chocolate to lilac. The E locus decides whether dark pigment extends.
Q: What color will I get if I breed two chestnut agouti rabbits?
A: Two heterozygous chestnut agouti rabbits (Aa Bb Cc Dd Ee) most commonly produce chestnut agouti babies, but they can also throw black self, black tortoiseshell, and other colors in the same litter. The most likely single 5-locus genotype is Aa Bb Cc Dd Ee at about 3.13 percent.
Q: Can two black rabbits have a chestnut baby?
A: Yes, if both black self parents carry the agouti allele. Two black self rabbits that are both Aa B_ C_ D_ E_ will produce chestnut agouti babies about 25 percent of the time and black self babies about 25 percent of the time, because each parent donates an A allele to about half the offspring.
Q: What is the difference between dilute and dense rabbit colors?
A: Dense color is the unmodified pigment, while dilute color is the same pigment spread out so it looks softer and paler. Homozygous dd dilutes dense black to blue and dense chocolate to lilac, while the underlying pattern stays the same. Two dilute carriers produce about 25 percent dilute babies in a litter.