Determining Your Blood Type

Name: ______

Blood types

Type / Distribution / Ratios
O+ / 1 in 3 / 38.4%
O- / 1 in 15 / 7.7%
A+ / 1 in 3 / 32.3%
A- / 1 in 6 / 6.5%
B+ / 1 in 12 / 9.4%
B- / 1 in 67 / 1.7%
AB+ / 1 in 29 / 3.3%
AB- / 1 in 167 / 0.7%

Type O = 46.1%

Type A = 38.8%

Type B = 11.1%

Type AB = 4%

1. Follow the instructions on the blood grouping test

2. What blood type are you? ______

Class distribution

Type / Student totals from classes
O+
O-
A+
A-
B+
B-
AB+
AB-

3. Does the class blood types fall in a similar fashion to the global blood type ratios and distributions?

4. During an investigation of a murder of a waitress (blood type A), the police arrest a male suspect with bloodstains (blood type A) on his clothes. The main claims that he is innocent and the blood on his clothes stems from his son. The police cannot get hold of his son, however they run a blood test of the man and his wife (the mother of the suspect’s son). The police conclude that the man has a blood type AB and his wife has blood type B.

Could the blood stains on the clothes of the suspect belong to his son?

5. An elderly couple dies in a traffic accident. The man has blood type AB+ and his wife has blood type O+. Shortly afterwards, a young man shows up and claims to be the sole heir to the dead couple. His blood type is AB+.

Can the young man be the deceased couple’s legitimate child?

6. A group of 5 people (2 men and 3 women) go climbing in the Andes. While passing a ledge, one of the men loses his foothold and falls down 15 feet. The others manage to bring him to the nearest hospital where it is established that an immediate surgical operation is needed in order to save the use of his damaged legs. It may be necessary to carry out a blood transfusion during the operation. Unfortunately, the injured person does not know his own blood type, however, he does remember that both his father and mother have blood type A-. The 5 other participants immediately offer to donate blood, if necessary. However, even before knowing the blood type of the patient 3 potential blood donors can be ruled out.

Which of the following below are not suitable donors for this recipient?

___ Man 1: AB-

___ Man 2: A-

___ Woman 1: 0+

___ Woman 2: B-

___ Woman 3: O-

7. Which donor blood can be used as universal donor blood?

8. Which blood type is called the universal recipient?

9. A married couple expects their 3rd child. A test shows that the mother has developed antibodies against the blood type of the fetus. The mother has blood type B-.

Circle the following men or man can be the father:

Man 1: B-

Man 2: O-

Man 3: A+

10. Approximately 40% of blood is blood cells. The task of one kind of blood cells is to fight body diseases. Which type of blood cells fights diseases?