Chimeraism

Chimeraism is a condition that occurs when two fertilized eggs fuse together to create one organism with two different sets of DNA. Different genes from each set of DNA may be expressed in different areas, creating a further condition called mosaicism. There is no definite conclusion as to whether this peacock is a chimera or whether it is exhibiting a form of genetic co-dominance; however, either way it’s an astonishing image!