autosomal dominant trait

tags: researchblogging.org, premature hair graying, autosomal dominant trait, genetics, horses, hair color, syntaxin-17, melanocortin-1 receptor, cis-acting regulatory mutation, melanoma, evolution This horse is in the process of losing its pigment. It will end up being all white by the time it is eight years old. Image: Horse Wallpaper [larger view]. Even though I have always been a fan of black horses, my heart did leap at the sight of the noble Shadowfax racing towards Gandalf in response to his call in the Lord of the Rings. White horses have symbolized purity throughout most ages and…