What is another word for extension gene?
Pronunciation: [ɛkstˈɛnʃən d͡ʒˈiːn] (IPA) 
The term "extension gene" refers to a gene that controls the color of the coat in mammals, primarily horses. There are several synonyms for this gene, including the "E locus" or "E gene," "extension locus," and "MC1R gene." This gene determines whether a horse will have a black or red base coat color, which is further modified by other genes. Variants of the extension gene exist, including the "E+ allele," which produces a black coat, and the "e" allele, which produces a red or chestnut coat. Understanding the role of the extension gene and its synonyms is crucial for animal breeders who want to control the coat color of their horses.
