Karl Landsteiner identified the ABO blood group in 1901. The ABO blood group includes four types of blood (A, B, AB, and O). The differences in blood types are due to the presence or absence of certain types of antigens and antibodies. Antigens are molecules that are located on the surface of the red blood cells (RBCs), and antibodies are molecules that are located in the blood plasma. Individuals have different types and combinations of these molecules. The goal of this investigation is to use what we know about the inheritance of ABO blood types to determine if Mr. Johnson can be excluded as the father of any of Mrs. Johnson’s children. The guiding question of this investigation is, Are all of Mr. Johnson’s children his biological offspring?
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Johnson’s children are his biological offspring or not. Considering that Ms.Johnson had an affair during her eight years of being married to Mr. Johnson. Mr. and Ms. Johnson had three children during their eight year married. Once Mr.Johnson found out about the affair, he wanted to find out if all of the children were his or not. To figure out which children belong to Mr.Johnson and which children belonged to Mr. Wilson blood samples were taken from each person. For the lab, individually, the procedure was to first clean work space, get safety equipment , Gather and Organize supplies. Once that part is complete, add two drops of blood sample A to well A and to well B on a blood-typing slide. Then add two drops of the correct antiserum to both samples. Then stir each sample for 10 sec with a clean toothpick. After 10 seconds check blood for clotting. Then record the data. And input the data into a table. Clean the wells before next use. Then repeat steps 1 through 10 for Mr.Johnson, Mrs.Johnson, Mr.Wilson, and the three kids. Below shows Table A, it explains the blood type. Also it shows if they clotted or did not clot after or during the
Johnson’s children are his biological offspring or not. Considering that Ms.Johnson had an affair during her eight years of being married to Mr. Johnson. Mr. and Ms. Johnson had three children during their eight year married. Once Mr.Johnson found out about the affair, he wanted to find out if all of the children were his or not. To figure out which children belong to Mr.Johnson and which children belonged to Mr. Wilson blood samples were taken from each person. For the lab, individually, the procedure was to first clean work space, get safety equipment , Gather and Organize supplies. Once that part is complete, add two drops of blood sample A to well A and to well B on a blood-typing slide. Then add two drops of the correct antiserum to both samples. Then stir each sample for 10 sec with a clean toothpick. After 10 seconds check blood for clotting. Then record the data. And input the data into a table. Clean the wells before next use. Then repeat steps 1 through 10 for Mr.Johnson, Mrs.Johnson, Mr.Wilson, and the three kids. Below shows Table A, it explains the blood type. Also it shows if they clotted or did not clot after or during the