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Trying To Guess Parent Blood Type  This thread currently has 3,401 views. Print Print Thread
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Lola
Tuesday, February 10, 2009, 7:33pm Report to Moderator Report to Moderator

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Sa Bon Nim
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cause O is recessive......if all are Os, I d reckon he might be an O as well......As and Bs are dominant.......
what C wrote is pretty accurate.


''Just follow the book, don't look for magic fixes to get you off the hook. Do the work.'' Dr.D.'98
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Paula 0+
Tuesday, February 10, 2009, 9:10pm Report to Moderator Report to Moderator
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Harry,
My dad is an A, my mom is an O+ (hunter I think).  They had 6 of us.  Two brothers are type A, one brother is an O, my sisters and I are all O's.  One of them is O negative.  
I don't know if my brothers are positive or negative.  
I am O+ and my DH is B+
We have 2 O-sons, one B-son, our only daughter is also O+, as is our youngest son.  Just to let you know, I think your dad could be type A.  My type A dad and brothers are less active then the type O brother, he can't sit still.  Not them though.  They also gained weight at middle age, actually we all did, except the type O brother is in the best physical shape, he was a marine for 28 years.....
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grey rabbit
Tuesday, February 10, 2009, 9:48pm Report to Moderator Report to Moderator

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Kyosha Nim
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I really think it is a mistake to try to figure out someone's blood type by their level of activity. Or to try to figure out blood type by the way someone looks, it just doesn't work!


“Tomorrow is the most important thing in life. Comes into us at midnight very clean. It’s perfect when it arrives and it puts itself in our hands. It hopes we’ve learned something from yesterday.”

John Wayne's last words
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Ribbit
Tuesday, February 10, 2009, 10:22pm Report to Moderator Report to Moderator

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Kyosha Nim
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Well, the thing about the way they look---certain blood types tend to pack on weight either around the hips or around the belly, one or the other.  If he's obviously got all his weight around his belly, we can guess he's either A or O.  If it's around his hips, we can guess he may be either B or AB----I think I remember that right.  And the stomach acid levels tend to affect the way you act.  Type Os tend to have high stomach acid, which  may lead to an outgoing personality with perhaps a little aggression.  Type As tend to have low stomach acid, leading to perhaps a mellow temperament until aggravated, which causes cortisol levels to rise and stay risen, which makes it appear that we hold grudges.  

Some of this is how my  husband and I type people we hardly know.  Look at body shape and look at temperament.  We're often right.


ISTJ, BTD since 5/05.  Battling chronic Lyme disease since ~1985.

"Everything is permissible for me, but not everything is beneficial..."  I Corinthians 6:12

Family: 3 As, 1 B, 1 AB, 1 O
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Ribbit
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Kyosha Nim
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Quoted from C_Sharp


Since an O is recessive you must receive an O allele from both parents for a child to have an O blood type. (Wouldn't that make things easier.)



Oh! (Pun intended.)  Maybe that means we'll never have an O child then.  

Me: A
Dad: A
Mom: O

DH: B
Dad: B
Mom: A

None of our children are getting any O from my husband's side of the family.  


ISTJ, BTD since 5/05.  Battling chronic Lyme disease since ~1985.

"Everything is permissible for me, but not everything is beneficial..."  I Corinthians 6:12

Family: 3 As, 1 B, 1 AB, 1 O
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JJR
Tuesday, February 10, 2009, 10:44pm Report to Moderator Report to Moderator

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Quoted from Ribbit
Well, the thing about the way they look---certain blood types tend to pack on weight either around the hips or around the belly, one or the other.  If he's obviously got all his weight around his belly, we can guess he's either A or O.  If it's around his hips, we can guess he may be either B or AB----I think I remember that right.  And the stomach acid levels tend to affect the way you act.  Type Os tend to have high stomach acid, which  may lead to an outgoing personality with perhaps a little aggression.  Type As tend to have low stomach acid, leading to perhaps a mellow temperament until aggravated, which causes cortisol levels to rise and stay risen, which makes it appear that we hold grudges.  

Some of this is how my  husband and I type people we hardly know.  Look at body shape and look at temperament.  We're often right.


When I had weight on, it was all belly.  And I probably could've been  mistaken for an O AT TIMES.  But actually, I kind of agree with your assessment.  But there are other factors at work.


The poster formerly known as "ABNOWAY"

"Finally brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things." - Phillipians 4:8
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grey rabbit
Tuesday, February 10, 2009, 10:47pm Report to Moderator Report to Moderator

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Quoted from Ribbit


Oh! (Pun intended.)  Maybe that means we'll never have an O child then.  

Me: A, Dad: A, Mom: O

DH: B, Dad: B, Mom: A

None of our children are getting any O from my husband's side of the family.  


Your mom is Oo, your dad is either an Aa or Ao, either way you are an Ao. Your DH's dad could be Bo and his mom could be Ao which means it is possible for him to be Bo - in fact his mother HAS to be Ao if he is a B and not an AB. So it IS POSSIBLE for you to have an O child.


“Tomorrow is the most important thing in life. Comes into us at midnight very clean. It’s perfect when it arrives and it puts itself in our hands. It hopes we’ve learned something from yesterday.”

John Wayne's last words
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Jenny
Wednesday, February 11, 2009, 5:35am Report to Moderator Report to Moderator

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Ee Dan
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those people who are still having difficulty in doing intergenerational research on blood types (and that makes a fascinating family tree in itself) could benefit from finding in one or two of the older BTD books the grid pattern with each parent arrayed horizontally and vertically to see how the combinations and possibilities work out in practice. It is easy to forget that even if we are an A or a B we will still have a recessive o, A or B as well. In my case with an o/o father we were able to deduct that our mother was A1/ A2  as their 3 children are all A, and in fact are A1/o and A2/o (blood bank evidence with regard to the A1 and A2).



Eating half and exercising double.
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Vicki
Wednesday, February 11, 2009, 5:53am Report to Moderator Report to Moderator

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I'm working on publishing a movie on this very topic.  Stay tuned - I made a bit of a blunder so it is taking longer than expected!

The movie I made hopefully plays a little slow for you.  I did this to make it easier for people who have never used a Punnett square.

The video is available on YouTube here:  http://www.youtube.com/watch?v=ctkBBcsZ8Rw

Comments:  there is a problem with the cross lines in my table (too light) and the text is too small so take advantage of YouTube's full screen view even though it makes the text more blurry.  I will be publishing the same movie another way eventually.  

Revision History (5 edits; 4 reasons shown)
Vicki  -  Wednesday, February 11, 2009, 3:52pm
Vicki  -  Wednesday, February 11, 2009, 3:39pm
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Lola
Wednesday, February 11, 2009, 8:50pm Report to Moderator Report to Moderator

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Sa Bon Nim
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looking good!


''Just follow the book, don't look for magic fixes to get you off the hook. Do the work.'' Dr.D.'98
DNA mt/Haplo H; Y-chrom/J2(M172);ISTJ
The harder you are on yourself, the easier life will be on you!
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Ribbit
Wednesday, February 11, 2009, 10:20pm Report to Moderator Report to Moderator

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Kyosha Nim
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Quoted from grey rabbit


Your mom is Oo, your dad is either an Aa or Ao, either way you are an Ao. Your DH's dad could be Bo and his mom could be Ao which means it is possible for him to be Bo - in fact his mother HAS to be Ao if he is a B and not an AB. So it IS POSSIBLE for you to have an O child.


Yes, my mom is Oo and my dad is probably Aa.  We think both his parents were As, but we're not positive.  So we can have an O baby since we both have recessive o blood?


ISTJ, BTD since 5/05.  Battling chronic Lyme disease since ~1985.

"Everything is permissible for me, but not everything is beneficial..."  I Corinthians 6:12

Family: 3 As, 1 B, 1 AB, 1 O

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koahiatamadl
Wednesday, February 11, 2009, 11:06pm Report to Moderator Report to Moderator

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Kyosha Nim
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Yes, you may yet end up with all four types in your family  
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grey rabbit
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Quoted from Ribbit


Yes, my mom is Os and my dad is probably Aa.  We think both his parents were As, but we're not positive.  So we can have an O baby since we both have recessive o blood?


If your DH is a B then he has a recessive o since you have a child that is an A, the baby got the A from you and the recessive o from him. You have a recessive o because your mother was an Oo, you have a child that is a B so that child got the B from your husband and the recessive o from you. That's the way I see it unless some of your children are adopted or are from a different father/mother. Therefore, yes, you could have an O baby because both you and your husband have a recessive o (that is why O's will never disappear, they pop up once in a while because of just this kind of arrangement).P.S. both his parents cannot be Aas if he is a B.


“Tomorrow is the most important thing in life. Comes into us at midnight very clean. It’s perfect when it arrives and it puts itself in our hands. It hopes we’ve learned something from yesterday.”

John Wayne's last words

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JJR
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Kyosha Nim
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This is interesting!!!  Does that mean that neither of my parents had a recessive O?  


The poster formerly known as "ABNOWAY"

"Finally brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things." - Phillipians 4:8
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grey rabbit
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Kyosha Nim
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Quoted from JJR
This is interesting!!!  Does that mean that neither of my parents had a recessive O?  


Not necessarily:
Ao +Bo = AB or Ao or Oo or Bo.
AB +Oo = Ao or Bo.
AB + Bo = Ao or AB or Bo.
Aa +Bb =AB .
AB +AB =Aa or Bb or AB.
Take all the letters and combine them, remembering that O is always recessive and so to be an O you must be a Oo. Anyone that is NOT an AB can carry a recessive o.


“Tomorrow is the most important thing in life. Comes into us at midnight very clean. It’s perfect when it arrives and it puts itself in our hands. It hopes we’ve learned something from yesterday.”

John Wayne's last words
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Ribbit
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Kyosha Nim
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No, DH's mom is an A and his dad is a B.  It's MY dad's parents who we think were both As.

I'd kind of hoped we'd stop with 3 types---on the other hand, if we end up with a bunch of Explorers, it does make cooking easier.


ISTJ, BTD since 5/05.  Battling chronic Lyme disease since ~1985.

"Everything is permissible for me, but not everything is beneficial..."  I Corinthians 6:12

Family: 3 As, 1 B, 1 AB, 1 O
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grey rabbit
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Kyosha Nim
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Quoted from Ribbit
No, DH's mom is an A and his dad is a B.  It's MY dad's parents who we think were both As.


It doesn't really matter, as far as your children's blood type goes, what your dad's parents were. I don't know much about B's, but I have two girls, one A and one O. Before I knew anything about the BTD I used to joke that I could fix a balanced meal, fill just one plate, set it in front of one girl and let her eat her fill, then move the same plate to the other girl and both would be satisfied and full. That is just one example of how very different they are(and they are best friends to this day at ages 22 and 25).


“Tomorrow is the most important thing in life. Comes into us at midnight very clean. It’s perfect when it arrives and it puts itself in our hands. It hopes we’ve learned something from yesterday.”

John Wayne's last words
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Vicki
Friday, February 13, 2009, 4:45am Report to Moderator Report to Moderator

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Sun Beh Nim
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Ribbit,  

I'll work on a movie for your situation, too.  I do encourage you to scratch out punnett squares to check it out for yourself.  


        A         O   <-- you

B     AB      BO

B    AB       BO              

50% chance of your child being AB
50% chance of your child being B
0% chance of your child being AB
0% chance of your child being O

In the above example, if your DH were Type B with no O recessive, then you could not have produced the A child together   So the situation must be as listed below:

       A     O <-- you

B    AB  BO

O   AO  OO

25% chance of your child being AB
25% chance of your child being B
25% chance of your child being A
25% chance of your child being O

Each baby has equal opportunity to be any blood type with your pairing!  

  Amazing, eh?
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Vicki
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Sun Beh Nim
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Here's the possible parings of two A's.....



         A        A

A     AA      AA

A    AA       AA

Can only produce all A children.  

~~~~or~~~~

         A      O

A     AA    AO

A    AA     AO

Can only produce all A children.

~~~~~or~~~~~

        A    O

A     AA   AO

O    AO  OO

75% chance of child being Type A
25% chance of child being Type O



--

Two A's cannot produce B or AB children but can produce Type O children.

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JJR
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My Sister and brother in law are both A's and have 2 A's and I'm not sure what their third is.  I think they assumed he's an A but now hearing this, I didn't realize this and I don't think they did either.  I guess it's possible for him to be an O.


The poster formerly known as "ABNOWAY"

"Finally brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things." - Phillipians 4:8
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Vicki
Friday, February 13, 2009, 3:31pm Report to Moderator Report to Moderator

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Absolutely!

Both my parents are secretors and I am a non-secretor.  25% chance is 1 in 4 - not unlikely at all!

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Captain_Janeway
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Kyosha Nim
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My dad is A and my mom is O.  I have three other siblings and there was only one A in the mix when statistically it is a 50/50 probability.

I have a first cousin who is A and her husband is O. They have three kids and none of them are type A.

Both of my parents are Rh+. I am the only Rh- in the family.

Reality does not always follow statistical probability though. In my case only  the Rh blood types have followed probability.

Dr. D. mentions ABO incompatibility between group O women and group A or B spouses of these women. In these cases, according to him there will be an excess of group O offspring. I do not know for sure if that applys in my mothers case or not. She never had a miscarriage and according to my mom she always had very regular cycles and always knew when she was pregnant without even needing a pregnancy test.

I suspect that both of my parents may be non-secretors though. Non-secretor children who are blood groups A or B born to group O mothers are far less likely than secretor children of groups A or B to be born with hemolytic disease of the newborn (HDN) caused by ABO incompatibility between mother and child.


Rh Neg, Le(a+b-), NN, Fy(a-b+)

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Vicki
Friday, February 13, 2009, 5:29pm Report to Moderator Report to Moderator

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The stat is the chance for each child - not for the overall family makeup.  Each time I toss a coin, it has a 50% chance of landing heads up and a 50% chance of landing tails up. This does not mean that I'll get exactly 10 heads and exactly 10 tails if I toss the coin 20 times.

Each child has a certain percentage chance of being the outcome blood types.  

Quoted Text
I suspect that both of my parents may be non-secretors though. Non-secretor children who are blood groups A or B born to group O mothers are far less likely than secretor children of groups A or B to be born with hemolytic disease of the newborn (HDN) caused by ABO incompatibility between mother and child.


Interesting.  Do you have a link on this?  I'm a Type A non-secretor born from a Type O secretor mother with a Type A secretor father.  

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Captain_Janeway
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Kyosha Nim
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Quoted from Vicki
The stat is the chance for each child - not for the overall family makeup


Exactly, and after teaching this for the past 3 years you would be surprised at the number of students that don't know.


Rh Neg, Le(a+b-), NN, Fy(a-b+)

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Captain_Janeway
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Kyosha Nim
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Quoted from Vicki
Interesting.  Do you have a link on this?  I'm a Type A non-secretor born from a Type O secretor mother with a Type A secretor father.  

I do not have any online links only textbook. Here are some excerpts from Human Blood Cells: Consequences of Genetic Polymorphisms and Variations, ICP Publishers, copyright,2000

Antibodies to ABO in maternal blood are frequently known to cause haemolytic disease of the newborn (HDN), but the disease is often clinically insignificant and does not require medical intervention.11,247,249 The incidence of ABO haemolytic disease  is significantly higher in some racial groups,247,250-252 which may be related in part to environmental factors. The usual causative antibody is anti-A,B present in group O women,253 with other ABO antibodies less frequently involved. The severity of HDN, which depends on both a high level of maternal IgG anti-A,B in the foetus (due to placental transport of IgG and not IgM), and a sufficient level of ABH antigen expression on foetal red cells, is generally unpredictable.256

Secretory ABH substances do not provide protection against ABO haemolytic disease but rather appear to cause it by inducing immunisation of the mother. 248,249



What the authors are saying here is that IgG anti-A,B causes HDN by virtue of being a small molecule that readily crosses the placental barrier. Bodily secretions from a secretor fetus who is group A or group B will provoke the synthesis of IgG anti-A,B by the mother. Non-secretor infants who completely lack ABH substances or that carry miniscule amounts will apparently not provoke this type of immune response in the mother.

Another textbook reference I have basically says the same thing in a different way. According to Neville J. Bryant, An introduction to Immunohematology, Saunders, 1982

IgG anti-A or IgG anti-B is the cause of ABO HDN. "Since there is no association of the disease with infants who are non-secretors, however, either this is not the whole explanation or the amount of substance in the tissues and the trace amounts in the fluids of non-secretor infants are a sufficient protection."

The more recent reference is most likely the more accurate. Antibodies can be eluted from red blood cells and the class determined. The red blood cells from a group A or B infant when crossed over to the maternal circulation are more likely going to be destroyed automatically by the preexisting anti A or anti B antibodies. So it is reasonable to suspect that blood group substances in the body fluids of secretor infants will provoke immunization in the mother.


Rh Neg, Le(a+b-), NN, Fy(a-b+)

INTP/INTJ at work

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