There is usually a biological or technical explanation:
• Some genes mask others. For example, a dog with two copies of the recessive red variant will have a reddish or cream coat even if it carries other colour variants, because recessive red prevents those colours from being expressed in the coat. Their effects may still be visible elsewhere, such as on the nose.
• Genes we do not analyse may be involved. Many traits depend on several genes, while the test analyses specific variants only.
• Age and environment play a role. Coat colour can change with age, sunlight or diet, and final size also depends on nutrition and health.
• Each company uses its own method. Chips, variants analysed, databases and algorithms differ, so results may broadly agree while differing in detail.
If you think a result does not make sense, email info@kokogenetics.com with the kit code and we will review it.