Confidence votes 261K. The act of inbreeding is to procreate with a very close relative. This practice produces inferior organisms because there is not enough genetic variety, which can lead to genetic disorders and weaknesses.he genetic diversity that results from breeding with others who aren't related is a good thing: if a plague, natural disaster, sudden climate change, or arrival of a new predator threatens a species, genetic diversity makes it more likely that some individuals exist who can adapt to the change.