Genetics

Science.gov -- for Scientific Information Only 
"Science.gov searches over 40 databases and over 2000 selected websites, offering 200 million pages of authoritative U.S. government science information, including research and development results." 

USA.gov -- The U.S. Government's Official Search Engine
"Official web portal contains comprehensive information on government resources, services and forms for citizens, businesses and government."

Entrez -- The Life Sciences Search Engine 
"Searches across the National Center for Biotechnology Information (NCBI) websites."