Turnaround time
10 workdays
48.4
40
Genetic test for Yellow Belly (EDNRB2-related) - Ball python.

Overview
Our DNA test for Yellow Belly in ball pythons detects the two known Yellow Belly variants in the EDNRB2 gene, a gene involved in the development of pigment cells. Yellow Belly is inherited as an incomplete dominant trait: wild-type animals carry no Yellow Belly variant, while heterozygotes carry one variant and often show richer yellow coloration, characteristic flames along the flanks, and checkering along the ventral edges. Animals carrying two Yellow Belly alleles display the nearly white super form known as Ivory. Because the heterozygous form can be visually subtle and variable, a DNA test is a valuable tool for accurate identification and targeted breeding selection.
Included subanalyses
This analysis includes the following subanalyses:
Phenotypes
Allele combinations & result interpretations
Below, for each tested locus, you will find the possible allele combinations that may be reported within this analysis, together with a brief explanation of their genetic meaning. The interpretation of possible interactions between different loci is included in the report, but is not shown here in full because that would lead to too many combinations on this page. The final expression may also depend on other genes and their interaction.
Allele combination: No tested Yellow Belly variant detected (wt/wt)
This animal does not carry the tested EDNRB2-associated Yellow Belly variant. Other alleles in the Yellow Belly complex or other colour and pattern factors can still influence the final appearance.
Allele combination: One copy of the tested Yellow Belly variant (wt/del)
This animal carries one copy of the tested EDNRB2-associated Yellow Belly variant. One copy can already influence colour or pattern in this series and can be passed on to offspring. The visible result can still vary, especially in combination with other alleles in the Yellow Belly complex.
Allele combination: Two copies of the tested Yellow Belly variant (del/del)
This animal has two copies of the tested EDNRB2-associated Yellow Belly variant. That supports stronger expression of this specific allele and this variant will be passed on to offspring. The final appearance can still vary because of other colour and pattern factors.
Allele combination: No tested Yellow Belly variant detected (wt/wt)
This animal does not carry the tested EDNRB2-associated Yellow Belly variant. Other alleles in the Yellow Belly complex or other colour and pattern factors can still influence the final appearance.
Allele combination: One copy of the tested Yellow Belly variant (wt/del)
This animal carries one copy of the tested EDNRB2-associated Yellow Belly variant. One copy can already influence colour or pattern in this series and can be passed on to offspring. The visible result can still vary, especially in combination with other alleles in the Yellow Belly complex.
Allele combination: Two copies of the tested Yellow Belly variant (del/del)
This animal has two copies of the tested EDNRB2-associated Yellow Belly variant. That supports stronger expression of this specific allele and this variant will be passed on to offspring. The final appearance can still vary because of other colour and pattern factors.
References