a process in which something passes to a different stage
In fact, at each stage of development, different globin genes are turned on and off through a process of transcriptional regulation called "switching".
a city of western West Virginia on the Ohio river at the mouth of the Kanawha
Well-known dominant alleles occur in the human genes for Huntington disease, a form of dwarfism called achondroplasia, and polydactylism (extra fingers and toes).