blood types the genetics of blood type. codominance both alleles are dominant. neither allele for a...
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Blood Types
The Genetics of Blood Type
Codominance
• Both alleles are Dominant.• Neither allele for a trait is recessive.
• They both express themselves in the phenotype.
• Genotype labels are: I I• I = blood: A=type A coded protien
B=type B coded protien
A B
Phenotype
Genotype
The Genetics of Blood Type
Phenotype
Genotype
A
The Genetics of Blood Type
Phenotype
Genotype
A
B
The Genetics of Blood Type
Phenotype
Genotype
A
B
AB
The Genetics of Blood Type
Phenotype
Genotype
A (I )
B (I )
AB
O (recessive)= i
The Genetics of Blood Type
A
B
Phenotype
Genotype
A+
A-
B
( + is dominant over - )
AB
O
The Genetics of Blood Type
( + = Rh factor, protein on cell, Antigen. Will be recognized by immune system as part of body. )
( - = no Rh factor antigen. If body comes in contact with +, it won’t recognize it as part of the body and will reject it )
The Genetics of Blood Type
Donor/Recipient?
Phenotype
Genotype
A+
A-
B+
B-
AB+
AB-
O+
O-
The Genetics of Blood Type
If Immune system doesn’t recognize a protein, A or B, it’ll reject it.A -Rh will not recognize +Rh and reject it.
Can receive: B+B-O+O- Will reject A+-AB+-
Can receive: B-O- Will reject A+-B+AB+-O+
Can receive: ALL blood types
Can receive: All – types Will reject all + types
Can receive: O+O- Will reject all others
Can receive: O- Will reject all others
Phenotype
Genotype
A+ AA++
A-
B+
B-
AB+
AB-
O+
O-
The Genetics of Blood Type
Phenotype
Genotype
A+ AA++, AO++
A-
B+
B-
AB+
AB-
O+
O-
The Genetics of Blood Type
Phenotype
Genotype
A+ AA++, AO++, AA+-
A-
B+
B-
AB+
AB-
O+
O-
The Genetics of Blood Type
Phenotype
Genotype
A+ AA++, AO++, AA+-, AO+-
A-
B+
B-
AB+
AB-
O+
O-
The Genetics of Blood Type
Phenotype
Genotype
A+ AA++, AO++, AA+-, AO+-
A- AA--, AO--
B+ BB++, BO++, BB+-, BO+-
B- BB--, BO--
AB+ AB++, AB+-
AB- AB--
O+ OO++, OO+-
O- OO--
The Genetics of Blood Type
The Genetics of Blood Type
How can we predict Blood Type inheritance?
Using a Punnett square!
Let’s look at possible blood types of the children of a couple whose blood types are AB- and O-.
The Genetics of Blood Type
First we need to determine their genotypes.
Looking at our chart, the genotype for AB- is AB-- and the genotype for O- is OO--.
We need to FOIL and then draw a Punnett square.
From one parent we can get A- or B-From the other we can only get O-.
The Genetics of Blood Type
O-
A- AO--
B- BO--
The Genetics of Blood Type
O-
A- AO--
B- BO--
The Genetics of Blood Type
O-
A- AO--
B- BO--
The Genetics of Blood Type
O-
A- AO--
B- BO--
The Genetics of Blood Type
O-
A- AO--
B- BO--
The Genetics of Blood Type
O-
A- AO--
B- BO--
The Genetics of Blood Type
O-
A- AO--
B- BO--
Phenotype
A-
B-
The Genetics of Blood Type
Your homework:
Blood Types Worksheet
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