Every physical characteristic your cat has contributes to survival. The barbs on a male cat's penis are no exception. They help ensure that his genes are passed on through successful mating. He was not born with them, and if he was neutered very young he may never even develop them. Male kittens are not born with barbed penises. Mar Vista Animal Medical Center, a veterinary clinic in California, says that cats reach puberty when they are about 6 months old.
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It isn't always easy to tell a male cat from a female cat, and it's even more difficult to sex a kitten or a neutered male. There are, however, telltale signs and behaviors that can make it easier to determine a cat's sex. Once a cat or kitten has been successfully sexed, unless the owner is a cat breeder, it's important to find a good vet who can spay or neuter the pet. For those adopting a kitten, chances are the new pet is only a few weeks old. Newborn and tiny kittens are so immature that it's nearly impossible to tell their sex.
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By Hannah Sparks. September 3, pm Updated September 3, pm. Take Daisy, a 9-year-old Ragdoll cat from Sydney, Australia. This rescue is as soft and snuggly as they come, her caregivers say.
Scientists believe men once had small spines on their genitalia such as those found in chimpanzees, cats and mice. Analysis of the genomes of humans, chimpanzees and macaques indicates that a DNA sequence thought to play a role in the production of these spines have been deleted in humans, but has been preserved in other primates. It suggests another genetic deletion may have led to the expansion of specific regions of the human brain. The study is in the journal Nature. They compared the human genome with those of the chimpanzee and macaque, and came up with stretches of DNA that have been conserved in our primate relatives but deleted in humans. The researchers then focused on two deletions, linking one to penile spines and another to the growth of specific areas of the brain. They then tested the effects of the deleted sequences in human skin and neural tissue, and found further evidence to support their claims. Penile spines are barb-like structures found in many mammals. Their role remains under debate, and they may play different roles in different species.