Chimeras are beings made of genetic data from two or more animals. It’s possible to create a chimera with DNA from up to three different animal groups (Mammal, avian, insects and amphibians). Attempts at chimeras with a higher number have nearly always failed. Chimeras usually end up having class I or class II paramorphism, although class III has been achieved occasionally.
There are two main methods of creating chimeras:
Splicing the DNA of a still developing embryo. This is the most common kind used as it has a lower chance of failure. It is possible to get class I or class II paramorphism with this method. These chimeras are usually able to reproduce with other chimeras who have a similar mix of DNA to them.
Combining suppression therapy and cell infusions to alter the DNA of post-natal creatures. This becomes significantly harder the older the creature is. Generally if they have not gone through puberty then class I paramorphism can be achieved. Reproductive abilities for these types of chimera are mixed but generally the paramorphism process sterilises them. If some features do not develop correctly then the chimera is considered a failure and will usually have a shortened lifespan; sometimes by as much as half of what it would normally be
Chimeras were first developed by Dr. Vernichtung, a supervillain now presumed dead. He created the Xenobreed organisation that still exists today after being diagnosed with an incurable disease. The Xenobreed and other villains who have created chimeras for darker uses have meant the public image of Chimeras has always been a bad one. Chimeras were made illegal to create in 2012, with human chimeras being illegal since the idea was first conceived in the 1960’s.