Most any type of DNA-based paternity test can tell whether or not you are a chimera. But you need a bit of luck too. Chimeras are really fraternal twins who fused together very early in development. The fusion happens early enough that there aren't any issues with being conjoined or having extra limbs or anything.
Brea, California. Brea (meaning oil or tar in Spanish) is a city in Orange County, California. The population as of the 2010 census was 39,282. It is located 33 miles southeast of Los Angeles.
Riverside is a city in Riverside County, California, United States, located in the Inland Empire metropolitan area. Riverside is the county seat of the eponymous county and named for its location beside the Santa Ana River. It is the most populous city in the Inland Empire as well as Riverside County, and is located approximately 60 miles (97 km) east of Los Angeles. } It is also part of the Greater Los Angeles area. Riverside is the 59th most populous city in the United States and 12th most populous city in California.