Animals
Many mammal species including humanity's closest primate relatives tend to avoid close inbreeding, especially if there are alternative partners available. However some chimpanzees have been recorded attempting to mate with their mothers. Male rats have been recorded engaging in mating with their sisters, but they tend to prefer non-related females over their sisters.
Livestock breeders often practice controlled breeding to eliminate undesirable characteristics within a population, which is also coupled with culling of what is considered unfit offspring, especially when trying to establish a new and desirable trait in the stock.
Read more about this topic: Incest
Famous quotes containing the word animals:
“The alcoholic trance is not just a haze, as though the eyes were also unshaven. It is not a mere buzzing in the ears, a dizziness or disturbance of balance. One arrives in the garden again, at nursery time, when the gentle animals are fed and in all the world there are only toys.”
—William Gass (b. 1924)
“It isn’t true that convicts live like animals: animals have more room to move around.”
—Mario Vargas Llosa (b. 1936)
“Old women snore violently. They are like bodies into which bizarre animals have crept at night; the animals are vicious, bawdy, noisy. How they snore! There is no shame to their snoring. Old women turn into old men.”
—Joyce Carol Oates (b. 1938)