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BTD Forums  /  Live Right 4 Your Type  /  can O and A  have O child
Posted by: Beth, Friday, February 1, 2008, 5:49pm
I am and O blood type...... does that mean both my mother and father have to be an O?  Or can a type O and type A have and O child?
I am thinking that in order to be a blood type O that both mother and father had to be type O.
And that a blood type O and blood type A can not have an O child.


Posted by: Captain_Janeway, Friday, February 1, 2008, 6:11pm; Reply: 1
O and A parents can have group O offspring as long as the A parent is heterozygous, ie has an AO genotype rather than homzygous AA.
Posted by: vandelam, Saturday, February 2, 2008, 12:19am; Reply: 2
My mother is an A, my father is an O, my brother is an A and I am an O.

Ee-I-Ee-I-O  ;D
Posted by: cindyt, Saturday, February 2, 2008, 1:03am; Reply: 3
My mother is an O, my father is an A, and my sister couldn't bring herself to do the test I sent her.  She could be A or O.
Posted by: dawgmama, Saturday, February 2, 2008, 1:58am; Reply: 4
Oh yeah, O's and A's make terrific kids. ;D Both of ours are O's.
Posted by: Melissa_J, Saturday, February 2, 2008, 2:02am; Reply: 5
Anyone, except an AB, can have an O child...unless they know that they're homozygous AA or BB, but most people don't have or need that information.

I'm and O, my husband is an A, and our kids are one O and one A.  My husband's parents are O and A, also, so we know my husband is heterozygous, Ao, as is our type A son. (I also owe his recessive O gene for our other son being an O.)
Posted by: 815 (Guest), Saturday, February 2, 2008, 2:20am; Reply: 6
I'm an A, my husband is an B and my sons are O and B.
Posted by: Chanur, Saturday, February 2, 2008, 3:37am; Reply: 7
I'm an AB, my dad is an A and my mother is a B with my siblings being A, B, and O. No, I am not joking, had BTD been around when we were kids my mom would've been stuck with taking care of all 4 types. This also means that my dad has to be AO and my mom has to be BO. If this where not so, they could not have had one of my brothers who is an O because O's are always OO because it's the recessive trait.

Yes, you can come help me do our cooking for family get togethers! ;D

My husband is an O. We have an A son. So he's got to be an AO rather than an AA since he is half of my husband's OO and got the A half of my AB.

Posted by: Lola, Saturday, February 2, 2008, 6:18am; Reply: 8
maybe your mom s an Ao and the 'milkman' is the O in the equation! ;D
;)
Posted by: Vicki, Saturday, February 2, 2008, 6:31am; Reply: 9
Lola, all cases above can produce an O child...which one are you talking about?  ;-)
Posted by: Lola, Saturday, February 2, 2008, 6:35am; Reply: 10
sorry, I meant Chanur s case.....
Bo...my bad!! LOL
but the milkman is probably still the O..... ;)
bad joke, I know! :) :K)
Posted by: Ribbit, Sunday, February 3, 2008, 2:26am; Reply: 11
Quoted from Chanur
I'm an AB, my dad is an A and my mother is a B with my siblings being A, B, and O. No, I am not joking, had BTD been around when we were kids my mom would've been stuck with taking care of all 4 types.


That's my husband's family exactly!  His dad's a B, his mom's an A, and they have 4 children--one of each type.  His mom says, "Boy, I wouldn't have ever followed that diet."
Posted by: Debra+, Sunday, February 3, 2008, 3:10pm; Reply: 12
I am an O and my hubby is an A and we have two daughters...one O and one A. :D

Debra :)
Posted by: Ribbit, Sunday, February 3, 2008, 9:30pm; Reply: 13
Oh, wouldn't it be so simple just to have all Os?  We have at least three different types so far in our family.  And now with me switching to the GTD, we're really 4 different types.  Maybe I'll switch my A son to my diet, but there's such huge differences in the A diet and the Warrior diet, I don't know what to think.
Posted by: AnutLisa, Monday, February 4, 2008, 10:08pm; Reply: 14
My dad's an O and my mom's an A - the 5 of us kids are a combination of Os and As.  :)
Posted by: Leanne, Saturday, February 23, 2008, 4:35am; Reply: 15
My father is an O, my mother is a B.  They had four of us girls all togther.  Three of us are O's and one is a B.
I married an A.  Our first three children are O's and our 4th is an A.  I'm still waiting on baby #5 to know what he/she is.
When my husband was in his biology class in college a few years ago the teacher told him that our first three children weren't his!  She said that it was impossible for anyone who was an A to produce an O heir.  
I'm glad I wasn't there to hear that!  It kills me how some people want to put science in a box.  Have some creativity, for crying-out-loud!

Leanne!
Posted by: Lola, Saturday, February 23, 2008, 6:32am; Reply: 16
great teacher he had there! ;)
Posted by: EquiPro, Monday, February 25, 2008, 8:30pm; Reply: 17
That teacher knew nothing, since ABO bloodtypes are some of the most basic science.

Here's how it works.  In our bloodtype there are 3 letters: A, B, and O (I know, it's not really "letters", but I'm keeping it simple).  Everyone gets 2 of these letters to make their bloodtype.  A and B are always expressed, but O is not.  Think of O as "zero".

So, you can be the following:

AA or AO = Type A bloodtype
BB or BO = Type B bloodtype
AB = AB bloodtype
OO = O bloodtype

Notice that AB and O bloodtypes have only ONE WAY for them to be that bloodtype, whereas A bloodtype and B bloodtype have TWO ways to be that bloodtype.

OK.

When 2 people get together to have a baby, EACH one of them contributes ONE of their own bloodtype letters to make the baby.  Remember, they have TWO letters, but they give ONE only to the baby.

So the following can happen:

If you are bloodtype AA, which is the A Bloodtype, you will ONLY contribute an A to the baby.

If you are bloodtype AO, which is also the A bloodtype, you can give the baby EITHER an A letter OR and O letter.

If you are bloodtype BB, which is the B bloodtype, you can give the baby ONLY a B letter.

If you are bloodtype BO, which is also the B bloodtype, you can give the baby EITHER a B letter OR an O letter.

If you are bloodtype AB, which is the only form of the AB bloodtype, you can give the baby EITHER an A letter OR a B letter.

If you are bloodtype OO, which is the ONLY form of the O bloodtype, you can ONLY give the baby the letter O.

SO

you can see how two people with bloodtype A could produce a baby with bloodtype O.  In that case, BOTH parents would have to be the AO bloodtype AND the bloodtype of the baby could be either AA, AO, or OO.  Overall, that baby would have a 75% chance of being an A bloodtype.

Your typical test for determining bloodtype does not tell you which two letters you have.  You are told you are "Type A", but you don't know if you are an AA or an AO.  You can most easily figure this out if you know your parent's bloodtype, your children's bloodtype and your mates bloodtype.  If all the adults are type A, but an O child pops out here and there, you know that someone in the family is an AO type A.

I hope that this is clear.

BTW, the only combo that most certainly CANNOT result in a type O child is if BOTH parents are AB.
Posted by: Ribbit, Tuesday, February 26, 2008, 12:56am; Reply: 18
My understanding is that O is an A mutation, so of course an A can have an O!
Posted by: EquiPro, Tuesday, February 26, 2008, 8:18pm; Reply: 19
Quoted from AnutLisa
My dad's an O and my mom's an A - the 5 of us kids are a combination of Os and As.  :)


So, you know for a FACT that your mom AO.  If she weren't, there could be NO Type O children!  She is the one that has to contribute the other O to her Type O offspring!

Posted by: Mrs T O+, Wednesday, February 27, 2008, 4:34pm; Reply: 20
This stuff that was discussed was learned in freshman biology class.  How terrible to tell someone his kids weren't his.

I met someone whose parents were A & B & had an O sibling, as well as other types. I think that is the coolest combination - to be able to produce all types.

My husband & I are the reverse - he's an AB & I'm an O with an A child & B child. That also is a cool combination.

My parents were A & O and my sis & I are both Os. I was disappointed to be an O, but now am glad. (I guess I don't like the letter O. Maybe we should be called Omega with the Greek letter. Now that would look very classy!)

I really don't mind having all types. Of course my kids are grown, so I don't feed them often.  I liked to cook & s tayed home, so if I had to do it, I'm sure I could work something out. There are plenty of compliant for all foods, especially veggies. Many folks who don't do the BTD have limited diets, anyway. Most families have certain eating patterns & eat little variety. For some, the BTD is an expansion of diet.
S S & L,
Mrs "T"    O+
Posted by: kate4975, Thursday, February 28, 2008, 6:10pm; Reply: 21
I have to be a BO because my A husband and I have an A daughter, but still don't know if he's AA or AO. Maybe this next baby will shed some light.
Posted by: Jane, Thursday, February 28, 2008, 8:43pm; Reply: 22
My mother's an A, my Dad was an O.  Both my brother and I are Os.  He's O+ and I'm O neg.  My ex is an AB and both our kids are A+.  I know that for sure because I had to have a rhogam shot after each delivery.  Whoever that teacher was should be ashamed...basic Mendelian biology.
Jane
Posted by: Leanne, Friday, February 29, 2008, 12:39am; Reply: 23
OK, I have a senario and I want to know if it's possible.
Parents of father:
Dad - B
Mom - A
Parents of mother:
Dad - O
Mom - B

The parents:
Mother - O
Father - B

Here are their childern's blood types:
#1 child - B
#2 child - O
#3 child - A

Now, is that last A child possible or was their hanky-panky going on?  The only A factor in all of this is the mother of the father.  Could he be a BA and have passed that A on to his child?
Very curious about this!

Leanne!
Posted by: Lloyd, Friday, February 29, 2008, 1:25am; Reply: 24
Quoted from Leanne


Now, is that last A child possible or was their hanky-panky going on?  
Leanne!


How about an adoption?

Posted by: Mrs T O+, Friday, February 29, 2008, 2:01am; Reply: 25
It's possible that someone was typed incorrectly. There's talk of mistakes in typing in the military. Were any of the men veterans?
Maybe even Baby A was mistyped...
S S & L,
Mrs "T"     O+  
Posted by: accidental_chef, Friday, February 29, 2008, 3:31am; Reply: 26
Quoted from Leanne
OK, I have a senario and I want to know if it's possible.
Parents of father:
Dad - B
Mom - A
Parents of mother:
Dad - O
Mom - B

The parents:
Mother - O
Father - B

Here are their childern's blood types:
#1 child - B
#2 child - O
#3 child - A

Now, is that last A child possible or was their hanky-panky going on?  The only A factor in all of this is the mother of the father.  Could he be a BA and have passed that A on to his child?
Very curious about this!

Leanne!


In ERFYT Dr D talks about "revenge of the grandma" where a grandchild takes up the blood type of the grandma. And this situation that seems to be the case.

Posted by: Vicki, Friday, February 29, 2008, 4:43am; Reply: 27
accidental_chef, that's only possible when an O gene re-appears.  A and B cannot be recessive and are always expressed.

Mistyping (of parent or child), adoption, etc are all possible.

Posted by: Leanne, Friday, February 29, 2008, 4:16pm; Reply: 28
I was present at the birth and typed the baby myself.  I also typed the father several years ago.  The mother has her type on hospital records.  

Leanne!
Posted by: Vicki, Sunday, March 2, 2008, 2:00am; Reply: 29
There are rare cases where a mother has two types of DNA in her body.  This is called chimera.  Otherwise, there is a different father, mistyped mother, etc.

Here's one example:  http://news.bbc.co.uk/2/hi/health/3264467.stm

Posted by: Lola, Sunday, March 2, 2008, 2:37am; Reply: 30
fascinating!
Posted by: Melissa_J, Sunday, March 2, 2008, 6:52pm; Reply: 31
You also need to confirm the blood types of the parents, as sometimes memory is faulty or tests need to be re-done.

My sister's husband thought he was an A, until they typed their son out to be a B, (she's an O), and he admitted that the hospital told him his blood type after giving him morphine, so he could have remembered it wrong.  Their son is definitely his, so similar they could be twins if they were the same age.  

My college genetics teacher stopped handing out PTC test strips after uncovering an adoption where the child (now adult) had not been told he was adopted.
Posted by: 1011 (Guest), Sunday, March 2, 2008, 10:18pm; Reply: 32
Ok. Here's how it goes. Every person has two alleles for blood type. Let's just liken an allele to an ingredient that makes up the trait. In order to have a dominant trait only one parent has to pass a dominent allele. In order to have a recessive trait both parents must pass both recessive alleles. For instance A and B are dominant and O is recessive. Therefore if one parent passes the child an A and the other parent passes an O then the child has AO and A type blood since the A is dominant. If both parents pas A the child will have AA and will also have A type blood. The difference between the two though is that the child with AO has the potential to pass the O to the child (is a carrier) while the AA can only pass A. Since a parent with O type blood needs both alleles to get a recessive trait, the parent will be OO and will only have O to pass. So if you are AO and your husband is O type blood your child will be either OO (O type blood) or AO (A type blood but a carrier for O). If your blood is AA your child will have AO and have A type blood and be a carrier for O.
Posted by: Leanne, Monday, March 3, 2008, 3:59am; Reply: 33
So is that the same for someone who is a type B?  Could they be a "carrier" of an A if their mother was an A?
Posted by: Lola, Monday, March 3, 2008, 8:11am; Reply: 34
yes
Posted by: Mrs T O+, Monday, March 3, 2008, 1:40pm; Reply: 35
Re Melissa's comments: Many folks just don't remember their type. It isn't important to them. To some, their whole body is unimportant, while most of us here think it is extremely important. After all, we live in it!!!!
A friend who caught the early stage of thyroid cancer, commented that she didn't pay attention to her body. (I'm so thankful they caught it & I hope she now pays attention! Sadly her sister is fighting some kind of abdominal cancer!)

When I found out my type in high school, I was disappointed (not now!), but I sure didn't forget it. How can anyone forget something like that. But they do!!!!
To me, it's simple to figure out the types a child could have, but to others it is a big mystery. But becuase there is a lot of 'cheating' going on, there may be a child that doesn't match the parents' types. However, there are also errors in typing, forgetfulness, etc., so we shouldn't jump to conclusions.  
Don't we just love this BTD lifestyle! Who else can talk about blood types so much!? :)
Mrs "T"  O+  
Posted by: 1011 (Guest), Thursday, March 6, 2008, 7:09am; Reply: 36
To answer Leanne's question, both A and B are dominant genes. If one parent gives you A and the other gives you B since both are dominant, you will be AB.
Posted by: Henriette Bsec, Thursday, March 6, 2008, 9:52am; Reply: 37
Quoted from EquiPro
That teacher knew nothing, since ABO bloodtypes are some of the most basic science.

Here's how it works.  In our bloodtype there are 3 letters: A, B, and O (I know, it's not really "letters", but I'm keeping it simple).  Everyone gets 2 of these letters to make their bloodtype.  A and B are always expressed, but O is not.  Think of O as "zero".

So, you can be the following:

AA or AO = Type A bloodtype
BB or BO = Type B bloodtype
AB = AB bloodtype
OO = O bloodtype

Notice that AB and O bloodtypes have only ONE WAY for them to be that bloodtype, whereas A bloodtype and B bloodtype have TWO ways to be that bloodtype.

OK.

When 2 people get together to have a baby, EACH one of them contributes ONE of their own bloodtype letters to make the baby.  Remember, they have TWO letters, but they give ONE only to the baby.

So the following can happen:

If you are bloodtype AA, which is the A Bloodtype, you will ONLY contribute an A to the baby.

If you are bloodtype AO, which is also the A bloodtype, you can give the baby EITHER an A letter OR and O letter.

If you are bloodtype BB, which is the B bloodtype, you can give the baby ONLY a B letter.

If you are bloodtype BO, which is also the B bloodtype, you can give the baby EITHER a B letter OR an O letter.

If you are bloodtype AB, which is the only form of the AB bloodtype, you can give the baby EITHER an A letter OR a B letter.

If you are bloodtype OO, which is the ONLY form of the O bloodtype, you can ONLY give the baby the letter O.

SO

you can see how two people with bloodtype A could produce a baby with bloodtype O.  In that case, BOTH parents would have to be the AO bloodtype AND the bloodtype of the baby could be either AA, AO, or OO.  Overall, that baby would have a 75% chance of being an A bloodtype.

Your typical test for determining bloodtype does not tell you which two letters you have.  You are told you are "Type A", but you don't know if you are an AA or an AO.  You can most easily figure this out if you know your parent's bloodtype, your children's bloodtype and your mates bloodtype.  If all the adults are type A, but an O child pops out here and there, you know that someone in the family is an AO type A.

I hope that this is clear.

BTW, the only combo that most certainly CANNOT result in a type O child is if BOTH parents are AB.


I think this is VERY good explanation
- my daughter in 8th grade  had just made a huge biology report  about this
where they made eldon cards etc...
What I think is a real issue is that some fathers are actually NOT the fathers and that gives a problematic result.. as well as wrong military reports !
My dad was tested in military and they said he was B rh+
so there was a lot of issues when my mum got pregnant - she is O rh-  
and it turned out that he had been mistyped :
he was actually AB rh- so there was no problems with the preganancies that resulted in 2
B rh- girls.
I had forgotten all about grandmothers revenge when I got pregnant with an A
- so I thought= AB child - but no she is an O negative child...

Posted by: Vicki, Saturday, March 8, 2008, 6:15am; Reply: 38
I need to make a movie explaining this...it is a very easy concept to grasp...but difficult to describe without a bit of animation :-)

I'll see if I can do this within a week...stay tuned!

Posted by: Lola, Sunday, March 9, 2008, 2:06am; Reply: 39
I love movies! ;)
Posted by: Shamrockgreen7, Tuesday, August 26, 2008, 7:11pm; Reply: 40
Where is the movie?
Posted by: Lola, Tuesday, August 26, 2008, 7:23pm; Reply: 41
you need to pm Vicky, and ask her if she did do the movie, cause I haven t heard anything yet! :)
Posted by: Amazone I., Wednesday, August 27, 2008, 4:20pm; Reply: 42
Grandma's revenge.... ;) ;D


she was an AB+.....
dad was an A+...mum is still the BRh-
bothe kiddies became AB Rh+.....(clap)(smarty)(ok)

btw.
I do have clients;she is an A+ and he is an O; both kiddies are
O's!!!
Posted by: Melissa_J, Wednesday, August 27, 2008, 4:24pm; Reply: 43
http://www.biology.arizona.edu/Human_Bio/problem_sets/blood_types/inherited.html

Here's a calculator where you put in both parent's types and get possible types for the child, or one parent and a child to get possible types for the other parent.

Any parent can have an O, except for ABs, because AB's definitely have no O allele.  A + A can = O, as they can both be Ao.  Same for A+B, B+B, A+O and B+O...all can produce an O.  The only way parents can be sure of what they'll get is if they're both Os...they can only get Os.  If my A son marries an A and they have an O child, I guess that would be Grandma's revenge too because half of her O-ness would have come from me.  (I'd hope the little O is nice and stubborn too, and that she wakes them up at night...ah, revenge!  Of course I'd happily come over and watch her so they could nap)
Posted by: Jane, Wednesday, August 27, 2008, 4:48pm; Reply: 44
My Dad was an O and my Mom's an A and both my brother and I are Os.  I'm the only O- in the group but my uncle and a bunch of my mother's cousins are all O-.
Posted by: Ribbit, Thursday, August 28, 2008, 1:18am; Reply: 45
Quoted from Melissa_J
  (I'd hope the little O is nice and stubborn too, and that she wakes them up at night...ah, revenge!  Of course I'd happily come over and watch her so they could nap)


*lol!*  What a good grandmother you will be!
Posted by: Amazone I., Thursday, August 28, 2008, 5:50am; Reply: 46
that's what I'm going to say, too Melissa :K) (smarty)(clap)(dance)(sunny)
Posted by: azredhead57, Wednesday, September 17, 2008, 8:07pm; Reply: 47
This all reminds me of an eye color argument I had with my sisters a few years ago  ;)
Posted by: Melissa_J, Thursday, September 18, 2008, 7:00am; Reply: 48
Is it similar to the phone call the genetics professor's secretary got at my college?

Sec:  Hello?
Woman: My son and his wife both have green eyes, but their child has brown eyes.  That's not possible if it's his child, right?
Sec: Well, that is a bit odd
Woman:  (shocked)I knew it!

She left no number to call back on, and the secretary was no genetic counselor, just a student in a different major.  Some woman out there hung up thinking her daughter in law was fooling around.  Of course, the genetics professor could have offered other explanations, as it's all more complicated than Mendel's garden peas.

My oldest son has dark brown eyes, his father has greenish eyes and I have blueish eyes.  He's definitely his son, and wasn't switched at birth as our recognition of each other was instant and unchangable.  I still don't know the full explanation, other than that multiple genes are involved, but I like his explanation as to why he has dark hair and eyes but little brother is blue-eyed and blondish...he was born first and took all the color :)
Posted by: Lola, Thursday, September 18, 2008, 3:24pm; Reply: 49
both my parents have dark brown eyes if not actually black...
all 4 siblings have dark eyes, and I supposedly was switched at birth or got both grandma and pa s revenge!! I ll take the later explanation, I think! lol
mine are greenish blue.....well you know Melissa, you met me last year and I don t wear contacts! ;)
Posted by: Jane, Thursday, September 18, 2008, 3:34pm; Reply: 50
My ex and I both have brown eyes (mine as a little greenish at times) and one of my sons has brown eyes and the other bright blue.  Blue is recessive.  My father had hazel eyes and his mother had blue eyes.  My ex's father had blue eyes.  I remember how surprised I was when my younger one was born with this white blond hair and very blue eyes that stayed that way!
Jane
Posted by: TJ, Thursday, September 18, 2008, 6:25pm; Reply: 51
I think eye color is mixed-dominance (i.e. multiple genes involved).  If there were only blue eyes and brown eyes, maybe not, but there are also green and gray, there are a few people with two different colored eyes, and some people have two colors in the same eye.
Posted by: Melissa_J, Friday, September 19, 2008, 3:56am; Reply: 52
Yes, my husband and I don't have brown eyes, but they aren't pure blue or pure green either.  There are probably other genes and nutritional factors that can switch different colorations back on or back off as well...as with curly hair... it's considered dominant, but if somebody also has a gene to have no middle layer in their hair, then the curliness can't express, then straight ends up dominant.

My sister and her husband are darker, but their kids are blond as can be with blue eyes.  My husband and I were very blond as kids, but our kids aren't.  My eyes are mostly blue, but they look green because they have yellow/gold in the middle...yellow and blue appears green but there's not a bit of green to them.  I'm the closest one out of six kids to have my mom's blue eyes.
Posted by: TJ, Friday, September 19, 2008, 12:20pm; Reply: 53
My brothers and I all had blond hair as children but it turned brown as we grew up.  Both my parents have brown eyes: dad's are dark, almost black, but mom's are light brown.  Mine are like mom's, but my youngest brother's are dark like dad's.
Posted by: Graedyn, Friday, September 19, 2008, 9:20pm; Reply: 54
Yeah, on the blood type question...I'm the only one of 4 kids that has O blood (I'm sure because I used to donate plasma). Both my parents are A's, but I'm assuming they were both Ao. I have an uncle on my dad's side that's O (no, there was no hanky-panky) so I know my dad has O in his family. So I would assume they both gave me their O recessive.
Posted by: Melissa_J, Friday, September 19, 2008, 11:06pm; Reply: 55
Most As are Ao and most Bs are Bo, so it's pretty common.  There's just no getting away from us Os ;D
Posted by: Ribbit, Saturday, September 20, 2008, 1:45am; Reply: 56
"Eye color is controlled by several genes and isn't a simple Mendelian trait."  - Dr. Croak.

"That's it?"  I asked.  

"Yep," he said, "If they don't get it, too bad."

:-/ ::)(think)
Posted by: 1262 (Guest), Thursday, December 4, 2008, 5:22am; Reply: 57
well im an a+ and my ex hubby is an a...
dd 1 is o+ and dd 2 is an a+
Posted by: Lola, Thursday, December 4, 2008, 9:06pm; Reply: 58
both of you have an O recessive gene then! :)
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