Chinese scientists working with goats targeted the myostatin gene as well as a growth factor gene known to control hair length. In humans, naturally occurring mutations in the growth factor gene cause a condition characterized by excessively long eyelashes, and the mutations have been linked to hair length in cats, dogs, and even donkeys. The scientists performed gene editing in a breed of goats known as Shannbei, cultivated for both its desirable meat and its hair fibers, which are used to produce
