Final answer:
An example of an interspecific hybrid that can produce fertile offspring is the mule, which is a hybrid between a male donkey and a female horse.
Step-by-step explanation:
An example of an interspecific hybrid that can produce fertile offspring is the mule, which is a hybrid between a male donkey and a female horse. Mules are usually sterile, but in some rare cases, they can produce offspring with other mules or with horses or donkeys. This is because horses and donkeys are closely related species that can interbreed, but their offspring, the mules, are usually infertile due to differences in chromosome numbers and genetic makeup. However, on rare occasions, mules can produce fertile offspring due to a rare genetic event called chromosome doubling, which results in offspring with a complete set of chromosomes.