do now: what’s your type? your blood type, that is! do you know it? (you might want to check…
DESCRIPTION
Four Types A B AB OTRANSCRIPT
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Do Now: What’s your type? Your blood type, that is! Do you know it? (You might want to
check your driver’s license if you don’t) If you do not know your blood type –
have you heard the word before? What does it mean?
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BLOOD TYPES
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Four Types A B AB O
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Copy this grid into your notes..
Antigens Antibodies Can accept blood from
Type A
Type B
Type AB
Type O
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What makes up a type? Blood types are determined by the
antigens (proteins) on their surface Like nametags…
A type: A antigens B type: ___ antigens AB type: ____ antigens O type: _____ antigens
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Copy this grid into your notes..
Antigens Antibodies Can accept blood from
Type A A
Type B B
Type AB A, B
Type O ----
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Protection Our bodies also make antibodies to help
fight off blood that ISN’T our type Body makes antibodies of antigens it
does NOT possess Example: Type A would make B antibodies Type B would make ____ antibodies? Type AB would make ____ antibodies? Type O would make ____ antibodies?
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Copy this grid into your notes..
Antigens Antibodies Can accept blood from
Type A A B
Type B B A
Type AB A, B ----
Type O ---- A, B
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What happens if we mix…? Anything with antigens that you have
antibodies for will be destroyed
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Knowing this… What precautions should we take with transfusions? A type can safely mix with ______? AB type can safely mix with ____?
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Since AB doesn’t have antibodies, it can mix with anything!
Since O has A and B antibodies, it can only mix with O
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Second Antigen: Rh Factor Only two types: Rh positive or negative UNLIKE A and B antigens, the body
doesn’t make antibodies for Rh automatically if it is negative If exposed once, it will make the antibodies If exposed again, the body will attack
Issue: Rh- woman giving birth to two Rh+ babies..
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Baby Daddy Drama. A woman with blood type AB (IAIB) marries a man
with blood type O (ii). The child has blood type AB (IAIB). Is this man the child’s father?
Step One: Draw a punnett square and put the parents on each side
iAiBi
i
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How to Tell… A woman with blood type AB (IAIB) marries a man
with blood type O (ii) The child has blood type AB (IAIB). Is this man the child’s father?
Step Two: Cross the Squares
iA i iB i
iA i iB i
iAiBi
i
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How to Tell… A woman with blood type AB (IAIB) marries a man
with blood type O (ii). The child has blood type AB (IAIB). Is this man the child’s father?
Step Three: Decode the Punnett Square
iA IType A
iB IType B
iA i Type A
iB IType B
iAiBi
i
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How to Tell… A woman with blood type AB (IAIB) marries a man
with blood type O (ii). The child has blood type AB (IAIB). Is this man the child’s father?
Step Four: Analyze! Could a type AB baby have come from the parents? (awkward)
iA IType A
iB IType B
iA i Type A
iB IType B
iAiBi
i
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You Try A woman with blood type A or IAi marries a man
with blood type B or IBi. They child has blood type O or ii. Is this man the child’s father? Draw a Punnett Square to justify your response.