Harriet Happy Face Harriet Happy Face is made up of a combination of dominant and recessive alleles [Diagram]. (2018). T. Riggs (Ed.), UXL Ignition Science: Collaborative Projects (Vol. 2). UXL. https://link.gale.com/apps/doc/PC3679987111/SCIC?u=mlin_m_njhs&sid=bookmark-SCIC&xid=4a773cea