Sickle cell gene inheritance scheme for one parent with sickle cell trait (SCT) and one parent with no sickle cell gene. Possibilities with each pregnancy: 50% normal (AA); 50% SCT (AS). (A, normal hemoglobin; S, sickle cell hemoglobin) Source: Sickle Cell Disease, Pharmacotherapy: A Pathophysiologic Approach, 10e Citation: DiPiro JT, Talbert RL, Yee GC, Matzke GR, Wells BG, Posey L. Pharmacotherapy: A Pathophysiologic Approach, 10e; 2017 Available at: http://accesspharmacy.mhmedical.com/DownloadImage.aspx?image=/data/books/1861/dipipharm10_ch102_f002.png&sec=135145386&BookID=1861&ChapterSecID=135145372&imagename= Accessed: December 24, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved