blood types
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BLOOD TYPES
An Example of Inheritance with Multiple AllelesModule 10 – GeneticsEssential Standard Bio.3.2.2
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BLOOD TYPESThe ABO blood group is an example of a
single gene that has multiple alleles in humans.Multiple Alleles = more than 2 forms of the
gene.There are 3 possible alleles for this gene:
A, B, and o.Remember that each person only has 2 alleles.A and B are codominant, and o is recessive.
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BLOOD TYPES
A and B are 2 different molecules found on the outside of red blood cells.
http://learn.genetics.utah.edu/content/begin/traits/blood/
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A
Type B
Type AB
Type O
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A
Type B
Type AB
Type O
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A
Type B B
Type AB
Type O
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A
Type B B
Type AB A and B
Type O
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A
Type B B
Type AB A and B
Type O None
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A AA or Ao
Type B B
Type AB A and B
Type O None
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A AA or Ao
Type B B BB or Bo
Type AB A and B
Type O None
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A AA or Ao
Type B B BB or Bo
Type AB A and B AB
Type O None
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BLOOD TYPE CHART
Blood Type (Phenotype
)
Surface Molecules
Alleles (Genotype)
Type A A AA or Ao
Type B B BB or Bo
Type AB A and B AB
Type O None oo
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BLOOD TYPES
Doctors need to determine blood type before a person can get a blood transfusion because the red blood cells of incompatible blood types could clump together, causing death.
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BLOOD COMPATIBILITY CHART
Blood Type (Phenotype)
Type A
Type B
Type AB
Type O
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BLOOD COMPATIBILITY CHART
Blood Type (Phenotype)
Compatible Blood Types for
Transfusions
Type A
Type B
Type AB
Type O
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BLOOD COMPATIBILITY CHART
Blood Type (Phenotype)
Compatible Blood Types for
Transfusions
Type A Type A or Type O
Type B
Type AB
Type O
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BLOOD COMPATIBILITY CHART
Blood Type (Phenotype)
Compatible Blood Types for
Transfusions
Type A Type A or Type O
Type B Type B or Type O
Type AB
Type O
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BLOOD COMPATIBILITY CHART
Blood Type (Phenotype)
Compatible Blood Types for
Transfusions
Type A Type A or Type O
Type B Type B or Type O
Type ABType AB, Type A, Type
B, or Type O(Universal Recipient)
Type O
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BLOOD COMPATIBILITY CHART
Blood Type (Phenotype)
Compatible Blood Types for
Transfusions
Type A Type A or Type O
Type B Type B or Type O
Type ABType AB, Type A, Type
B, or Type O(Universal Recipient)
Type OType O
(Universal Donor)
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Dad
A
B
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A
B
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A A
B
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB
B
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB
B B
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB
B BB
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB A
B BB
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB A?
B BB
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB A?
B BB B
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB A?
B BB B?
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EXAMPLE PROBLEM #1
Mom has blood type B and Dad has blood type AB. What is the chance their child will have blood type B?
Mom
B ?
Dad
A AB A?
B BB B?
½ chance of type B
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EXAMPLE PROBLEM #2
Mom has blood type A and her child has blood type B. Could the father have blood type O?
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EXAMPLE PROBLEM #2
Mom has blood type A and her child has blood type B. Could the father have blood type O?The answer is NO. The child had to have inherited the B allele from their real father; the type O man just has oo so he could not be the father.
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EXAMPLE PROBLEM #2
Mom has blood type A and her child has blood type B. Could the father have blood type O?The answer is NO. The child had to have inherited the B allele from their real father; the type O man just has oo so he could not be the father.
This example comes from a true case in the 1940s involving the film star Charlie Chaplin.
http://www.cosmomovieawards.com/actors/charlie_chaplin.html