Best Answer: This is a great question. What makes an allele recessive is nearly always that it has a loss of function mutation. This means that that allele either produces no protein product, or one so altered that it cannot perform its job.
The Aggies competed in the Big 12 until joining the Southeastern Conference (SEC) on July 1, 2012. Texas A&M's official school colors are maroon and white. The teams are referred to as Aggies and the mascot is a Rough Collie named Reveille.
Texas A & M. A & M's can have a small dot of either brown or black on the top of their heads. These are throw backs to original breeding and are acceptable, though we try to use only the solid whites in our breeding program. Every once in awhile it will creep down to a spot on their backs or tails.