Showing posts with label "Generations". Show all posts
Showing posts with label "Generations". Show all posts

Monday, April 8, 2024

Bengal Cat Coats Are Less Wild Than They Look, Genetic Study Finds

Sarah C.P. Williams, from Stanford Medicine, writes that Bengal cats have marbled and spotted coats that make them look like smaller versions of jungle cats. It was assumed that the coats they have come from genes of Asian leopard cats that were bred with house cats, but now researchers are finding new evidence for another reason. They have discovered that their coat can be traced back to domestic cat genes that were aggressively selected for after cats were bred with wild cats. The appearance of the Bengal cat has always been present in domestic cat and through breeding they were able to bring the genes out. 

Cats are a good subject to use when studying how genetic variation leads to variation in appearance.  Asian leopard cat species Prionailurus bengalensis was crossed with domestic cats to create a new breed. Over many generations, cats with desired traits were selectively bred. Bengals were an interesting subject to study because they a recent genetic origin and unique appearance. This information is incredibly valuable to breeders because they will be able to “fine-tune” the way they breed animals to create new colors and patterns. Breeders are contributing their cats’ DNA for the study and want to be part of the data analysis as they are interested in learning more about their cat. Artificial selection is powerful, and research are just starting to realize this as they have discovered that Bengal cat coats could have possibly been selected without the help of the Asian leopard cat. 

As someone with an interest and a love for cats reading this article was intriguing. I never would have thought that the reason for the Bengals coats wasn’t because they were being bred from Asian leopard cats. It was interesting to learn that the coat colors came from the domestic cat and the genes were coaxed from specific breeding. 


Tuesday, July 31, 2018

Inked Mice Hint at How Tattoos Persit in People

French researchers suggest that tattoos are able to stay on skin due to a hand off of immune cells between generations known as macrophages. If proven true, this could overturn the idea that ink persists in connective tissue. Mice were tattooed on their tails with green ink to see how waste-disposing macrophages in the skin would respond. This was done by Immunologist Sandrine Henri. The study showed that macrophages gobbled up the ink but did not remove it. The cells held onto the ink until researchers killed the cells. About 90 days later, new macrophages moved in and absorbed the ink. This is what preserves the ink. Further research needs to be done says Desmond Tobin, a dermatologist. Macrophages that live in Mice do not live as long as those in humans. The persistence of those cells may be responsible for preserving ink in skin. These studies may help improve tattoo removal. With the combination of laser therapy and getting rid of skin macrophages, the ink could be removed.

I think this is fascinating because all this time we thought the connective tissue absorbed the ink, meanwhile there were cells behind it. This discovery could help better understand tattoos and help people who want to get rid of their tattoos. During these times, many people have tattoos. They are becoming more popular as society integrates them into an everyday style. Some people may jump into getting a tattoo and regret it later on. I think this discovery will be helpful for those who want tattoos removed.

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