Blood Type Concept Map Teacher’s Notes Blood is made of Red Blood Cells White Blood Cells Platelets Plasma its function is to which contain which contains which contains transport oxygen throughout your body your immune system the clotting factor vitamins, electrolytes, nutrients & hormones There are different blood types Blood Type A+ Contains Rh Protein √ AB+ Red Blood Cells’ Surfaces Contain A antigens √ √ √ AB O+ A Antibodies √ BAB + B antigens Plasma Contains Parent’s Blood Type B Antibodies √ Parent #1 A Parent #2 A or O √ A A or O √ √ B B or O √ √ B B or O √ √ A B √ √ A B √ O- √ √ O O √ √ O O How can blood typing aid a criminal investigation? If blood is found at the crime scene it can be matched to the blood type of potential suspects to either rule them out as a suspect or keep them as a potential suspect. What advantages does blood typing have over DNA? What are its disadvantages? Blood type analysis is much quicker and less expensive than DNA analysis. It can help investigators quickly rule out a potential suspect. It cannot positively identify the perpetrator because blood types are not unique, whereas DNA results can positively identify a suspect as the perpetrator.