Increased muscle size and improved racing performance in whippet dogs have also been traced to a single base-pair change, which inactivates a signal that normally suppresses muscle growth.

• 惠比特猎犬肌肉的增加和竞赛表现的增进，也被发现和单一碱基改变有关，它破坏了一个正常时会抑制肌肉生长的信号。