Final answer:
UKC breeders are urged to keep a diverse and healthy gene pool to avoid inbreeding complications such as increased fatal mutations and health problems such as genetic diseases.
Step-by-step explanation:
UKC breeders are encouraged to maintain a diverse and healthy gene pool. This is important because it helps prevent a range of problems that can occur due to inbreeding, such as an increase in fatal mutations, a reduced ability for gene flow, and the introduction of new genes that could be beneficial to the population's health. For example, close relatives should not be allowed to mate since it can lead to a narrowed gene pool and associated health issues such as increased occurrence of specific genetic diseases like cancer, hip dysplasia, deafness, hereditary epilepsy, and allergies in animals.