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Labradors showing eumelaninistic colour phenotypes: Black (BB,Bb) and chocolate (bb). The three recognised colours of Labrador Retrievers result from differences in two genetic loci that affect pigment expression. Those affecting the colour of the dark pigment, eumelanin, are referred to as the B (brown) locus.
A typical yellow Labrador retriever Endal, the world's most decorated dog, wearing his PDSA Gold Medal This list of Labrador Retrievers covers notable individual dogs that belong to this breed. The Labrador retriever is the most popular breed of dogs (by registered ownership) in both the United States and the United Kingdom .
The occurrence of a dominant coat colour gene not belonging to the standard colours is a suspicion for crossbreeding with another breed. For example, the dilute gen D in the suddenly appeared variety "silver coloured" Labrador Retriever might probably come from a Weimaraner. [55] The same applies for Dobermann Pinschers suffering from Blue dog ...
A Labrador Retriever. Note the brown nose, and the yellow in the eyes. In Labradors this color is called "Chocolate," but it is the same as "Liver."
Articles relating to the Labrador Retriever, a British breed of retriever gun dog. It was developed in the United Kingdom from St. John's water dogs imported from the colony of Newfoundland (now a province of Canada), and was named after the Labrador region of that colony. It is among the most commonly kept dogs in several countries ...
The Labrador Retriever or simply Labrador is a British breed of retriever gun dog. It was developed in the United Kingdom from St. John's water dogs imported from the colony of Newfoundland (now a province of Canada ), and was named after the Labrador region of that colony.
The melanistic mask is caused by the M264V allele (known as E M) at the melanocortin 1 receptor (MC1R) locus, also known as the extension locus. [1] [2] It is completely dominant to the other alleles of the gene, and causes the melanocyte-stimulating hormone to bind to and activate melanocortin 1 receptors (located on melanocytes) in the mask's area, causing those melanocytes to produce ...
Micrograph of Melanin pigment (light refracting granular material—center of image) in a pigmented melanoma. Micrograph of the epidermis, with melanin labeled at left.