he·red·i·tar·i·an·ism 
(hə-rĕd′ĭ-târē-ə-nĭz′əm)
(hə-rĕd′ĭ-târē-ə-nĭz′əm)n.
The doctrine or school that regards heredity as more important than environmental influences in determining intelligence and behavior.
he·red′i·tari·an (hə-rĕd′ĭ-târē-ən) adj. & n.