Genetics Lab
Genetics Lab helps breeders sort through hidden recessives, pedigree color history, modifier influence, genotype assumptions, and ARBA-recognized naming without pretending rabbit color is ever as simple as one label.
Rabbit genetics calculator for breeders
Rabbit Genetics Calculator and ARBA Color Lookup
Genetics Lab helps breeders sort through hidden recessives, pedigree color history, modifier influence, genotype assumptions, and ARBA-recognized naming without pretending rabbit color is ever as simple as one label.
Rabbit genetics education for breeders
Rabbit genetics gets complicated fast. A rabbit may look straightforward on the wire and still carry recessives you would never guess from the surface alone. Add pedigree gaps, modifiers, uneven line history, and breed-specific variety language, and color work turns into more than matching labels on a chart. Genetics Lab is built for that middle ground: not just what a rabbit appears to be, but what it may be carrying, what the pedigree suggests, and what a breeder needs to think through before planning the next litter.
Rabbit genetics education for breeders
Hidden recessives and pedigree history
Rabbit color genetics rarely comes down to one visible color alone. A rabbit that looks straightforward on the wire can still surprise you in the nest box if the pedigree is carrying hidden recessives or uneven color history.
That is why breeders keep coming back to parents, siblings, grandparents, and the colors that keep resurfacing in a line. One oddball kit gets your attention. A pattern across several litters tells you something real.
Phenotype, genotype, and breeder assumptions
Phenotype is what you physically see: color, pattern, shading, ticking, white markings. Genotype is what the rabbit is carrying underneath, including recessives it may never visibly show.
A rabbit can look clean and consistent while still carrying something that does not show up until the right pairing comes along. That is where genotype assumptions have to stay tied to pedigree evidence instead of wishful thinking.
ARBA names and real breeder workflow
ARBA-recognized color names are the language breeders already use at the table, in the barn, and on pedigrees. If a genetics tool cannot speak that language, it usually stops being useful pretty quickly.
Keeping names consistent matters when you are reading pedigrees, comparing show results, cleaning up variety notes, or trying to make sense of what a line has actually been producing over time.
Why Genetics Lab is different
Rabbit color information has always been scattered. Some of it lives in old charts, some in forum threads, some in handwritten pedigrees, and a lot of it lives in the heads of breeders who have already made the mistakes once.
Genetics Lab tries to pull those pieces into one practical system. It combines public color lookup, genotype reasoning, pedigree-aware thinking, inheritance education, and breeder vocabulary in a way that matches how rabbit people actually work through color questions.
That matters because real breeding decisions are rarely about one label. They are about what is visible, what may be carried, what the pedigree keeps hinting at, and how much uncertainty still needs to stay on the table.
Modifiers & real-world color variation
Not every visible color difference comes from the major loci alone. Wideband, rufus intensity, smut, shading behavior, and other modifier influence can shift how a rabbit reads in a very real way once you are looking beyond a simple color label.
Two rabbits with similar core genotypes can still look noticeably different because modifier background and line history are not identical. That is why breeders keep checking previous litters, relatives, and line consistency instead of trusting the surface color by itself.
This is especially obvious in varieties where shade matters. Not all torts are created equal, and wideband-based colors can swing harder than newcomers expect depending on what has been sitting quietly in the pedigree.
How breeders use Genetics Lab
These are the day-to-day questions breeders usually work through before a pairing, after an unexpected litter, or while trying to clean up what a line is actually carrying.
Compare likely litter outcomes
Work through what a pairing may throw before you repeat a cross or chase a specific color goal.
Reason through hidden recessives
Use visible color, pedigree notes, and past litters to decide what may be quietly carried underneath.
Interpret pedigree color history
Look past one rabbit and read the line behind it when colors keep resurfacing generation after generation.
Explain unexpected colors
Sort through why an oddball kit showed up instead of assuming the pedigree had to be wrong.
Organize genotype assumptions
Keep your best-read genotype notes grounded in evidence instead of letting every rabbit turn into a guess pile.
Evaluate pairing compatibility
Study inheritance patterns before planning pairings that could open the door to colors you are not trying to produce.
Reference ARBA variety naming
Stay consistent with the names breeders, pedigrees, and show conversations are already using.
Study breed-specific color questions
Use the page as a working reference when a breed keeps raising the same modifier, Vienna, or variety cleanup questions.
Explore deeper genetics topics
Explore advanced genetics tools or explore pedigree and breeding tools.
Scale & complexity
On the ARBA side alone, Genetics Lab tracks 52 canonical breeds. The current breed-color catalog spans 624 breed and color combinations across 117 distinct color codes, which is already more variation than most breeders ever see laid out in one place.
Underneath that, the phenotype engine uses 82 primary phenotype templates that expand into 201 genotype template forms once alternate expressions are included. That is the real scale problem in rabbit genetics: not just more colors, but more ways pedigree history, hidden recessives, modifiers, pattern overlays, and genotype ambiguity can change what a litter does in practice.
Rabbit genetics by the numbers
52
canonical ARBA breeds
Tracked in the shared ARBA breed catalog used across the public genetics layer.
624
breed/color combinations
Counted from the current ARBA breed-color population data used by Show Rabbit Pro.
117
distinct color codes
Spanning self, agouti, shaded, pointed, tan pattern, wideband, broken, and more.
82
primary phenotype templates
The base phenotype catalog before alternate genotype expressions are counted.
201
genotype template forms
Built from 82 primary phenotype templates plus alternate mappings and special-case forms.
Topics breeders keep coming back to
Vienna gene
Why Vienna keeps surfacing where people were not expecting it, and why known carriers deserve better pedigree notes than they usually get.
Broken pattern genetics
How broken behaves in litters, why two brokens can still surprise you, and why markings rarely come out evenly from kit to kit.
Wideband & rufus
Why wideband and rufus intensity can push color far past the basic genotype summary people expect from a calculator.
Rabbit genotype basics
A plain-language look at what a rabbit shows on the surface, what it may carry underneath, and where breeder assumptions come from.
ARBA color guides
Using ARBA-recognized color names consistently in pedigrees, breeding notes, barn records, and show conversations.
Rabbit genetics FAQ
How does Genetics Lab help breeders?
It gives breeders a place to sort through color possibilities before making a pairing, but the bigger value is the thinking process around that. It helps you slow down and ask better questions about what a rabbit may be carrying, what the pedigree suggests, and what a line has actually been producing.
How are rabbit colors inherited?
Through combinations of genes passed down from both sire and dam. The tricky part is that the color you see is only part of the story. Rabbits can carry recessives quietly for generations and then throw something unexpected when the right pairing comes along.
Why do rabbit colors skip generations?
Usually because a recessive color stayed hidden in carriers until both sides finally matched up. A rabbit can carry a recessive color for generations without visibly showing it, which is why line history matters so much.
How much can a genetics calculator really tell you?
Quite a bit, if the pedigree history is good and the breeder is honest about what is known versus assumed. But hidden recessives are where rabbit genetics starts surprising people, so any prediction still needs to be treated like a best read rather than a promise.
What causes blue-eyed white rabbits?
Most breeders are talking about Vienna or blue-eyed-white-related inheritance, and that deserves careful attention. Blue-eyed whites do not come out of nowhere. The clues are usually sitting somewhere in the pedigree if the records are good enough.
What is the Vienna gene in rabbits?
Vienna can hide better than people think. A rabbit may show obvious white marks, or it may show almost nothing at all and still pass Vienna forward. That is why pedigree color history and known carriers matter so much.
Can two broken rabbits produce solids?
Yes. Broken pattern is not the same thing as locking every kit into broken markings. Pattern outcomes still depend on what each rabbit is carrying, and the litter can come back more mixed than beginners expect.
Why do broken patterns vary between kits?
Broken is not a paint-by-numbers pattern. One kit may carry a lot of white, another very little, even in the same litter. The pattern gene is only part of what you are seeing.
What is the difference between phenotype and genotype in rabbit genetics?
Phenotype is what you can see in front of you. Genotype is what the rabbit is carrying underneath. If phenotype is the coat on the wire, genotype is the part that explains why the litter did not all come out looking the same.
Why can two rabbits with similar colors produce different litters?
Because rabbits that look similar are not always carrying the same thing. One may be hiding recessives, one may have different modifier background, and one pedigree may be much cleaner than the other even when the surface color looks close.
Why do rabbit colors vary in shade?
Because major loci are only part of the picture. Wideband, rufus intensity, smut, shading behavior, and line background can all change how a rabbit reads in real life.
Why do tort rabbits vary in shade?
Not all torts are created equal. Some stay clean and even, some run dark, some wash out, and some change with age, molt, and line background. Pedigree history usually tells you more than one rabbit standing on the table.
Does Genetics Lab use ARBA-recognized color names?
Yes. It is built around breeder vocabulary and ARBA-recognized naming, because that is the language people actually use in pedigrees, at shows, and in everyday breeding conversations.
Can Holland Lops carry Vienna unnoticed?
Absolutely. Holland Lops are one of the breeds where breeders talk about Vienna for a reason. It can sit quietly in a line until a pairing finally brings it to the surface.
Is this page only for advanced genetics users?
No. It helps if you are just trying to understand what a rabbit may carry, and it still helps if you have been linebreeding long enough to know where the surprises usually hide.