Can a solid black dog produce harlequin puppies? Yes, a solid black Great Dane can produce harlequin puppies. This is possible because the Harlequin gene acts as a modifier that is only visibly expressed when the dog also possesses the Merle gene. If a dog inherits the Harlequin gene but completely lacks the Merle gene, […]
Understanding Dominant vs Recessive Black Genes in Dogs
What is the difference between dominant and recessive black genes? The difference between dominant and recessive black genes comes down to their location in the dog’s DNA, how they are inherited, and whether they actually exist in the Great Dane breed. Dominant Black (K B ) • Genetic Location: The dominant black gene is located […]
Impact of the D Gene on Fawn and Brindle Great Danes
How does the D gene affect fawn and brindle Danes? The D gene (also known as the D-series or MLPH gene) controls color dilution by lightening a dog’s dark pigment (eumelanin) to blue, which is a greyish color. A dog must inherit two copies of the recessive dilute allele (d/d) for this dilution to be […]
Breeding Chocolate Great Danes: Understanding the B-Locus
How do breeders use the B-locus for chocolate colors? The B-locus (specifically the TYRP1 gene) determines whether a Great Dane will have a standard black base coat or a brown (chocolate) base coat. Here is how breeders use the B-locus to understand and produce chocolate colors: • Understanding the Recessive Trait: The chocolate gene (b) […]
Breeding Genetics: Preventing Double Merles Effectively
How do breeders use genetics to avoid double merles? Breeders use an understanding of genetics and modern DNA testing to carefully plan litters and avoid producing double merles (MM), which are at a high risk for severe vision and hearing impairments. Here is how breeders apply genetic principles to prevent double merles: 1. Recognizing That […]
Understanding Merle vs. Harlequin Merle Dogs
What is the difference between Merle and Harlequin Merle? The difference between a standard Merle and a Harlequin Merle comes down to the length of the genetic insertion at the Merle gene locus (SILV or PMEL17). • Standard (or Classic) Merle: Dogs with a normal merle pattern have an insertion length of 78 to 86 […]
Understanding A and E Genes in Dog Breeding
How do breeders use A and E genes to find masks? Breeders use the A and E genetic series in tandem, along with modern DNA testing, to determine whether a dog carries the black mask trait and whether that mask will be visibly expressed in its offspring. Here is how breeders use these two genes […]
Understanding K-Locus Alleles: Solid Black vs. Brindle
Which K-locus allele is dominant: solid black or brindle? The solid black allele (K B ) is dominant over the brindle mutation (K Br ). On the K-locus (the CBD103 gene), the solid black allele (K B ) is the most dominant version of the gene. While the brindle allele (K Br ) is dominant […]
Health Risks of the MM Genotype in Dogs
What are the health risks associated with the MM genotype? The MM genotype, commonly referred to as a “double merle” or homozygous merle, occurs when a dog inherits two copies of the merle gene. This genetic combination drastically reduces pigment, often producing dogs with primarily white coats, which in turn increases the likelihood of severe […]
Understanding A and E Genes in Dog Breeding
How do breeders use A and E genes to find masks? Breeders use the A and E genetic series in tandem with DNA testing to determine whether a dog carries the black mask trait and whether that mask will be visible in its offspring. • The A-Series (Agouti gene): This locus determines the dog’s underlying […]