1. What is the Coat Color Calculator?

The Coat Color Calculator predicts the probability of offspring coat colors based on the genetic makeup (genotype) of the parent dogs. It uses basic Mendelian genetics principles to estimate the distribution of possible coat colors in puppies.

2. How Does the Calculator Work?

The calculator uses Punnett square genetics:

Where:

• B — Dominant allele for black coat
• b — Recessive allele for brown coat
• BB — Homozygous black (phenotype: black)
• Bb — Heterozygous black (phenotype: black but carries brown)
• bb — Homozygous brown (phenotype: brown)

Explanation: Each parent contributes one allele to their offspring. The combination of these alleles determines the puppy's coat color.

3. Understanding Canine Coat Genetics

Details: This simplified model shows basic black/brown inheritance. Actual dog coat color genetics can be more complex with multiple genes affecting pigmentation, patterns, and dilution.

4. Using the Calculator

Tips: Select the known or suspected genotype for each parent. If unsure whether a black dog carries brown, select Bb to see both possibilities.

5. Frequently Asked Questions (FAQ)

Q1: Why doesn't my dog's color match these predictions?
A: Real coat color is often controlled by multiple genes. This calculator only models the B locus (black/brown).

Q2: What if I don't know the parent's exact genotype?
A: If a black dog has produced brown puppies, it must be Bb. Otherwise, you may need genetic testing to be certain.

Q3: Are there other coat color genes?
A: Yes, genes for dilution (D), spotting (S), and patterns (K, A, E) all interact to produce the final coat appearance.

Q4: Can this predict other colors like yellow or brindle?
A: No, this only predicts black vs. brown. Other colors involve different genetic loci.

Q5: How accurate are these predictions?
A: For the B locus only, these are 100% accurate genetically, but phenotype may be affected by other genes.