1. What is your blood type? Pg. 8-9
Do you know what your blood type is?
How many possible blood types are there?

2. Are there only 2 alleles for each trait? Pg.8
Multiple Alleles - A gene that has more than ________ alleles (or forms of a gene). In other words, not just one dominant and one recessive allele (i.e. R and r).
Even though there may be three or more different alleles – remember that each person can only carry two alleles for each gene (or trait). 2

3. How is blood type determined?
In human blood groups, there are three different alleles that determine the basic blood type. Type A and Type B (which are codominant) and Type O (which is recessive).
Your blood type is determined by which two alleles you inherit from your mom and your dad. These alleles tell your body what type of antigen to produce on your red blood cells (RBCs).

4. How is blood type determined?
Antigens are molecules on the blood cells that are recognized by the immune system.
Blood type __ has only A antigens on their RBCs.
Blood type __ has only B antigens
Blood type ___ has both A and B antigens
Blood type __ does not have either A or B antigens. A B AB O

5. How is blood type written?
The following are symbols that are used for blood types:
Blood Type (Phenotype)
Genotype(s)
Type __ ii
IA IA or IA i
IB IB or IB i
IA IB O A B AB

6. How is blood type inherited?
Practice: Only the genotypes & phenotypes that appear in the punnett squares need to be written.
1. A man with type O blood marries a woman with type AB blood, what are the possible blood types of their children?
Possible genotypes of offspring:
i i
IA i: 2/4
IB i: 2/4 IA IB
IA i
Possible phenotypes of offspring:
IB i
Type A= 2/4
Type B= 2/4

7. More Practice pg. 9 YES it’s possible IA i IB i IA IB IB i IA i ii
Is it possible for a man with type A blood and a woman with type B blood to have one child with type O blood and another child with type AB Blood? Why or why not? Show your work!!!
IA i IB i
YES it’s possible
IA IB
IB i
IA i ii

8. Why does knowing your blood type matter?
Sometimes when individuals lose too much blood due to a trauma or surgery, other blood can be given back to them. This is called a ________________ .
transfusion

9. Why does knowing your blood type matter?
antigen
Due to the presence of the _________ on the red blood cells, it is extremely important that the correct blood type be given.
If unidentified antigens are present on a cell, _____________ will attach to the antigens & the __________ system will attack the foreign cell.
If the wrong blood is transfused, the antibodies will cause the blood to clump up, causing the individual to go into shock and possibly die.
antibodies
immune

10. Why does knowing your blood type matter?
universal donor
Type O is known as the __________________. Since there are no antigens on the blood cells it can be given to someone with type A, B, AB or O.
Type AB is called the ____________________. A person with type AB blood could receive a transfusion of blood from any of the four blood types since its body would recognize both the A and B antigens.
universal recipient

11. Do you know your blood type? Are you positive?
You may have heard blood type described as positive or negative. Why?
Red blood cells may also have a second antigen called _______________. This trait is not caused by multiple alleles like the ABO blood groups, rather it is influence by simple complete dominance.
Rh Factor

12. Do you know your blood type? Are you positive?
Rh ___________ allele causes people to produce the Rh antigen on their blood cells. (Dominant)
Rh ____________ allele DOES NOT provide the instructions for making a Rh antigen on the blood cells. (Recessive)
negative
A person that is AB+ has three antigens on their blood cells (A, B and Rh+).