This paper presents the role that heredity place an important part in an individual's behavior. It shows how anyone's life condition may be improved through an understanding of the mechanics of heredity and the application of the principles of Eugenics. This paper is primarily addressed to educators, who play a very important role in the growth and development of the youth. An understanding of heredity, as one of the basic factors that influence behavior will help them provide for better means of meeting the complex needs of school children with varied mental abilities, and physical and emotional make-ups. Based on the statement above we as group eleventh we say thanks for God Bleesed us to make this paper done. Grateful acknowledgment is here made to those who helped this researcher gather data for this paper. This work would not have reached its present form without the lecturer motivation and also our friends opinions to make this paper done.