I started to create a page describing basic Herp Genetics, but I found an excellent set of webpages created by New England Reptile Distributors that give a terrific presentation and background on Herp Genetics! There's no reason to reinvent the wheel when they have done such a masterful job, so if you need to learn the basics of Herp Genetics, please visit NERD's Intro to Reptile Genetics. I have listed below the potential breeding outcomes of litters from the snakes that I have or that I have available for sale. Please remember that these outcomes are according to the Punnett Square, and actual outcomes may (and probably will) differ, especially if the litter is small! Click the Plus sign next to each breeding matchup to see the results. If needed, a list of genetic terms can be found here. If you have a litter from an Albino 66% Possible Het Anery (Het Sharp Snow), and you want to see what genes the parents could possess, take a look at the Success! section at the bottom of this page. You can also use the Success! section to determine what it will take to produce a certain type of morph. Key of Alleles: A - Normal allele for melanin production a - Recessive allele for albinism N - Normal allele for erythrin production n - recessive allele for anerytherism - 1. Sharp Albino 66% Possible Het Anery (Het Sharp Snow) x Sharp Albino 66% Possible Het Anery (Het Sharp Snow) - both prove to be Het Anery (Het Sharp Snow):
| Sharp Albino Het Anery (aaNn) x Sharp Albino Het Anery (aaNn) |
|---|
Possible Gene Pairings (Gametes) | aN | an | aN | aaNN | aaNn |
|---|
an | aaNn | aann |
|---|
- Result Totals (for every 4 offspring):
- (1) Snow (aann) (25% of litter)
- (2) Albinos Het for Anery (aaNn) (50% of litter)
- (1) Albino (aaNN) (25% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | aaNN | Albino | 3 | Albino 66% Possible Het for Anery (Het Snow) | 25% | 2 | aaNn | Albino and Het for Anery | 50% | 1 | aann | Albino and Anery | 1 | Snow | 25% |
- 2. Sharp Albino 66% Poss. Het Anery x Sharp Albino 66% Poss. Het Anery - one proves to not be Het Anery:
| Sharp Albino Het Anery (aaNn) x Sharp Albino (aaNN) |
|---|
Possible Gene Pairings (Gametes) | aN | aN | aN | aaNN | aaNN |
|---|
an | aaNn | aaNn |
|---|
- Result Totals (for every 4 offspring):
- (2) Albino Het Anery (aaNn) (50% of litter)
- (2) Albino (aaNN) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 2 | aaNN | Albino | 4 | Albino 50% Possible Het for Anery (Het Snow) | 50% | 2 | aaNn | Albino and Het for Anery | 50% |
- 3. Sharp Albino 66% Poss. Het Anery x Sharp Albino 66% Poss. Het Anery - both prove to not be Het Anery:
| Sharp Albino (aaNN) x Sharp Albino (aaNN) |
|---|
Possible Gene Pairings (Gametes) | aN | aN | aN | aaNN | aaNN |
|---|
aN | aaNN | aaNN |
|---|
- Result Totals for all offspring):
- (4) Albinos (aaNN) (100% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 4 | aaNN | Albino | 4 | Albino | 100% |
- 4. Sharp Albino 66% Poss. Het Anery x Anery 66% Poss. Het Albino - Albino proves to be Het Anery, Anery proves to be Het Albino:
| Sharp Albino Het Anery (aaNn) x Anery Het Sharp Albino (Aann) |
|---|
Possible Gene Pairings (Gametes) | An | an | aN | AaNn | aaNn |
|---|
an | Aann | aann |
|---|
- Result Totals (for every 4 offspring):
- (1) Snow (aann) (25% of litter)
- (1) Albino Het for Anery (aaNn) (25% of litter)
- (1) Anery Het for Albino (Aann) (25% of litter)
- (1) Double Het for Sharp Snow (Anery and Albino) (AaNn) (25% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNn | Double Het for Albino & Anery | 1 | Double Het for Albino & Anery (Snow) | 25% | 1 | Aann | Anery and Het for Albino | 1 | Anery Het for Albino (Het Snow) | 25% | 1 | aaNn | Albino and Het for Anery | 1 | Albino Het for Anery (Het Snow) | 25% | 1 | aann | Albino and Anery | 1 | Snow | 25% |
- 5. Sharp Albino 66% Poss. Het Anery x Anery 66% Poss. Het Albino - Albino proves to be Het Anery, Anery does not prove to be Het Albino:
| Sharp Albino Het Anery (aaNn) x Anery (AAnn) |
|---|
Possible Gene Pairings (Gametes) | An | An | aN | AaNn | AaNn |
|---|
an | Aann | Aann |
|---|
- Result Totals (for every 4 offspring):
- (2) Anery Het Albino (Aann) (50% of litter)
- (2) Double Het for Sharp Snow (Anery and Albino) (AaNn) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 2 | AaNn | Double Het for Albino & Anery | 2 | Double Het for Albino & Anery (Snow) | 50% | 2 | Aann | Anery and Het for Albino | 2 | Anery Het for Albino (Het Snow) | 50% |
- 6. Sharp Albino 66% Poss. Het Anery x Anery 66% Poss. Het Albino - Albino does not prove to be Het Anery, Anery proves to be Het Albino:
| Sharp Albino (aaNN) x Anery Het Sharp Albino (Aann) |
|---|
Possible Gene Pairings (Gametes) | An | an | aN | AaNn | aaNn |
|---|
aN | AaNn | aaNn |
|---|
- Result Totals (for every 4 offspring):
- (2) Albino Het for Anery (aaNn) (50% of litter)
- (2) Double Het for Sharp Snow (Anery and Albino) (AaNn) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 2 | AaNn | Double Het for Albino & Anery | 2 | Double Het for Albino & Anery (Snow) | 50% | 2 | aaNn | Albino and Het for Anery | 2 | Albino Het for Anery (Het Snow) | 50% |
- 7. Sharp Albino 66% Poss. Het Anery x Anery 66% Poss. Het Albino - Albino does not prove to be Het Anery, Anery does not prove to be Het Albino:
| Sharp Albino (aaNN) x Anery (AAnn) |
|---|
Possible Gene Pairings (Gametes) | An | aN | AaNn |
|---|
- Result Totals (for all offspring):
- Double Het for Sharp Snow (Anery and Albino) (AaNn) (100% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNn | Double Het for Albino & Anery | 1 | Double Het for Albino & Anery (Snow) | 100% |
- 8. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino proves to be Het Anery, Normal proves to be Double Het:
| Sharp Albino Het Anery (aaNn) x DH Sharp Snow (Albino and Anery AaNn) |
|---|
Possible Gene Pairings (Gametes) | AN | An | aN | an | aN | AaNN | AaNn | aaNN | aaNn |
|---|
an | AaNn | Aann | aaNn | aann |
|---|
- Result Totals (for every 8 offspring):
- (1) Snow (aann) (12.5% of litter)
- (2) Albino Het Anery (aaNn) (25% of litter)
- (1) Albino (aaNN) (12.5% of litter)
- (1) Anery Het Albino (Aann) (12.5% of litter)
- (2) Double Het for Sharp Snow (Anery and Albino) (AaNn) (25% of litter)
- (1) Het Albino (AaNN) (12.5% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNN | Normal Het for Albino | 3 | Normal 66% Double Het for Albino & Anery (Snow) | 12.5% | 2 | AaNn | Double Het for Albino & Anery | 25% | 1 | Aann | Anery Het for Albino | 1 | Anery Het Albino (Het Snow) | 12.5% | 1 | aaNN | Albino | 3 | Albino 66% Possible Het for Anery (Het Snow) | 12.5% | 2 | aaNn | Albino Het for Anery | 25% | 1 | aann | Albino and Anery | 1 | Snow | 12.5% |
- 9. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino proves to be Het Anery, Normal proves to be Het Albino:
| Sharp Albino Het Anery (aaNn) x Het Sharp Albino (AaNN) |
|---|
Possible Gene Pairings (Gametes) | AN | aN | aN | AaNN | aaNN |
|---|
an | AaNn | aaNn |
|---|
- Result Totals (for every 4 offspring):
- (1) Albino Het for Anery (aaNn) (25% of litter)
- (1) Albino (aaNN) (25% of litter)
- (1) Double Het for Sharp Snow (Anery and Albino) (AaNn) (25% of litter)
- (1) Het Albino (AaNN) (25% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNN | Normal Het for Albino | 2 | Normal 50% Double Het for Albino & Anery (Snow) | 25% | 1 | AaNn | Double Het for Albino & Anery | 25% | 1 | aaNN | Albino | 2 | Albino 50% Possible Het for Anery (Het Snow) | 25% | 1 | aaNn | Albino Het for Anery | 25% |
- 10. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino proves to be Het Anery, Normal proves to be Het Anery:
| Sharp Albino Het Anery (aaNn) x Het Anery (AANn) |
|---|
Possible Gene Pairings (Gametes) | AN | An | aN | AaNN | AaNn |
|---|
an | AaNn | Aann |
|---|
- Result Totals (for every 4 offspring):
- (1) Anery Het Albino (Aann) (25% of litter)
- (2) Double Het for Sharp Snow (Anery and Albino) (AaNn) (50% of litter)
- (1) Het Albino (AaNN) (25% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNN | Het Albino | 3 | Normal 66% Possible DH Snow (Albino and Anery) | 25% | 2 | AaNn | Double Het for Albino & Anery | 50% | 1 | Aann | Anery Het Albino | 1 | Anery Het Albino (Het Snow) | 25% |
- 11. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino proves to be Het Anery, Normal proves to be a Normal:
| Sharp Albino Het Anery (aaNn) x Normal (AANN) |
|---|
Possible Gene Pairings (Gametes) | AN | aN | AaNN |
|---|
an | AaNn |
|---|
- Result Totals (for every 2 offspring):
- (1) Double Het for Sharp Snow (Anery and Albino) (AaNn) (50% of litter)
- (1) Normal Het Albino (AaNN) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AANN | Normal Het Albino | 2 | Normal 50% Possible DH Snow (Albino and Anery) | 50% | 1 | AaNn | Double Het for Albino & Anery | 50% |
- 12. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino does not prove to be Het Anery, Normal proves to be Double Het:
| Sharp Albino (aaNN) x DH Sharp Snow (Albino and Anery AaNn) |
|---|
Possible Gene Pairings (Gametes) | AN | An | aN | an | aN | AaNN | AaNn | aaNN | aaNn |
|---|
- Result Totals (for every 4 offspring):
- (1) Albino Het for Anery (aaNn) (25% of litter)
- (1) Albino (aaNN) (25% of litter)
- (1) Double Het for Sharp Snow (Anery and Albino) (AaNn) (25% of litter)
- (1) Het for Albino (AaNN) (25% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNN | Normal Het for Albino | 2 | Normal 50% Possible DH Snow (Albino and Anery) | 25% | 1 | AaNn | Double Het for Albino & Anery | 25% | 1 | aaNN | Albino | 2 | Albino 50% Possible Het for Anery (Het Snow) | 25% | 1 | aaNn | Albino Het for Anery | 25% |
- 13. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino does not prove to be Het Anery, Normal proves to be Het Albino:
| Sharp Albino (aaNN) x Het Sharp Albino (AaNN) |
|---|
Possible Gene Pairings (Gametes) | AN | aN | aN | AaNN | aaNN |
|---|
- Result Totals (for every 2offspring):
- (1) Albino (aaNN) (50% of litter)
- (1) Het for Albino (AaNN) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNN | Normal Het for Albino | 1 | Normal Het for Albino | 50% | 1 | aaNN | Albino | 1 | Albino | 50% |
- 14. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino does not prove to be Het Anery, Normal proves to be Het Anery:
| Sharp Albino (aaNN) x Het Anery (AANn) |
|---|
Possible Gene Pairings (Gametes) | AN | An | aN | AaNN | AaNn |
|---|
- Result Totals (for every 2 offspring):
- (1) Double Het for Sharp Snow (Anery and Albino) (AaNn) (50% of litter)
- (1) Het for Albino (AaNN) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | AaNn | Double Het for Albino & Anery | 2 | Normal 50% Possible DH Snow (Albino and Anery) | 50% | 1 | AaNN | Het for Albino | 50% |
- 15. Sharp Albino 66% Poss. Het Anery x Normal 66% Poss. DH - Albino does not prove to be Het Anery, Normal proves to be a Normal:
| Sharp Albino (aa) x Normal (AA) |
|---|
Possible Gene Pairings (Gametes) | A | A | a | Aa | Aa |
|---|
| a | Aa | Aa |
|---|
- Result Totals for all offspring):
- (4) Normal Het Albino (Aa) (100% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 4 | Aa | Normal Het Albino | 4 | Normal Het Albino | 100% |
- 16. Sharp Albino 66% Poss. Het Anery x Snow - Albino proves to be Het Anery:
| Sharp Albino Het Anery (aaNn) x Snow (aann) |
|---|
Possible Gene Pairings (Gametes) | an | aN | aaNn |
|---|
an | aann |
|---|
- Result Totals (for every 2 offspring):
- (1) Snow (aann) (50% of litter)
- (1) Albino Het for Anery (aaNn) (50% of litter)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | aaNn | Albino Het for Anery | 1 | Albino Het for Anery (Het Snow) | 50% | 1 | aann | Albino and Anery | 1 | Snow | 50% |
- 17. Sharp Albino 66% Poss. Het Anery x Snow - Albino does not prove to be Het Anery:
| Sharp Albino (aaNN) x Snow (aann) |
|---|
Possible Gene Pairings (Gametes) | an | aN | aaNn |
|---|
- Result Totals for all offspring:
- Albino Het Anery (aaNn) (100%)
- Detail of Result Totals:
Genotypic Ratio of Possible Offspring | Genotype | Phenotypic Ratio of Possible Offspring | Phenotype | Probability | 1 | aaNn | Albino Het for Anery | 1 | Albino Het for Anery (Het Snow) | 100% |
Success! If you have been lucky enough to have a successful litter using an Albino 66% Possible Het Anery (or two), congratulations! Now comes the fun part - figuring out exactly what kind of genes they might possess. Here are a few things to remember: Keep in mind that you need to have a decent size litter to truly identify the genes at work. For example, to create a Snow from an Albino 66% Possible Het Anery x Normal 66% Possible Double Het breeding, you have a 1 in 8 chance of seeing a Snow in your litter (if the Albino proves to be Het Anery and the Normal proves to be a DH). So, if you only have a litter of 8 babies, but no snow, it doesn't necessarily mean that one or the other (or both) did not prove to be Het (or DH). This just means that it might take another breeding, or two, or three to determine exactly what genes they possess. With 66% Possible Het breedings, the larger amount of babies, the greater sample, and the closer the results should be to the Punnett Square. Of course the easiest way to prove out an Albino 66% Possible Het Anery is to breed it to a "visible" morph that definitely possesses the same genes. For example, by breeding an Albino 66% Possible Het Anery to a Snow you will be able to tell the genes that the Albino possesses by looking at the makeup of the litter. If there are Snows in the litter, then you know it is Het Anery. If there are only Albinos in the litter, but no Snows, then you know that it is not Het Anery. I have made the summary below to help you figure out exactly what genes you might be dealing with by looking at a litter of babies from an Albino Possible Het Anery (or two), assuming it was a decent size litter. You can also use this summary to determine what breedings you would need to try to produce a desired morph. Just match the # listed with the type of breeding that you did. You have a Snow in your litter - Congratulations you have a definite Het Anery! These potential breeding outcomes listed above have Snows in the litter: #1, #4, #8, and #16. You have Albinos AND Anerys in your litter, but no Snows - Congratulations you have a definite Het Anery, you just didn't get lucky this time, but hopefully next time! These potential breeding outcomes have Albinos AND Anerys in the litter: #4, and #8. You have Albinos and Normal looking babies in your litter - These potential breeding outcomes listed above have only Albinos and Normals in the litter: #6, #9, #12, and #13. You have Anerys and Normal looking babies in your litter - These potential breeding outcomes listed above have only Anerys and Normals in the litter: #5, and #10. You have only Albinos in your litter - These potential breeding outcomes listed above have only Albinos in the litter: #2, #3, and #17. You have only Normal looking babies in your litter - These potential breeding outcomes listed above have only Normal looking babies in the litter: #7, #11, #14, and #15. | |
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