French Bulldog Breeding Color Genetic Calculator
Key Color Genes in French Bulldogs
Blue Dilution (d)
The d/d genotype dilutes black to blue. One of the most iconic Frenchie color genes.
Chocolate (b)
The b/b genotype produces chocolate/liver coloration. Interacts with dilution to create lilac.
Tan Points (at)
at/a or at/at creates tan point markings (eyebrows, cheeks, legs, chest).
Rojo/Red (e)
e/e removes black pigment, revealing the underlying pheomelanin — creates rojo, cream, or red tones.
Fluffy (L gene)
l1 or l4 copies create the long-hair/fluffy phenotype. Recessive — requires two copies to express.
Simple Punnett Square Calculator
Select a gene and enter each parent's genotype (AA = homozygous dominant, Aa = carrier, aa = homozygous recessive/expresses)
Offspring Probability
Note: French Bulldog color genetics involves multiple interacting genes. This calculator demonstrates single-gene inheritance. For accurate breeding pair analysis, always consult DNA test results from a certified laboratory (Embark, Wisdom Panel, UC Davis).