The Maths and Science Thread - Collection of Problems and Facts

[AngryPixel]

I was just browsing through Wiki in half awake state . Then something popped in my head and i decided to check it. Results gave me a shock, followed by fear
I always knew that blood group O- was rare, but was never bothered about it till i knew the stats. I wish i hadn't checked them. There are just 2% O- people in India and just 4 % all around the world. Yeah we are universal donors, sounds nice but what the heck
Only consolation is that my bro is also O- so i dont have to be that worried about this fact

So the google says O Blood groups has both type of antibodies and no antigens. That leaves a few questions.

What is the disadvantage of O- blood group?(other that rarity)
Do the lack of antigens affect O- people?

 

[Chewie]

I have no idea what blood type I am. I suppose it would be quite helpful to know/find out...

 

[Varun]

What is the disadvantage of O- blood group?(other that rarity)

No one can donate blood to people with O- blood group, since they have antibodies against A, B and Rh antigens.

Yet, the others have an advantage if they have a person with O- in their surroundings, due to the fact that O- bearers are universal donors.

Do the lack of antigens affect O- people?

As you see, when blood is transfused from one person to another, the antibodies drive out all the antigens out of the cell.
Now, O- bearers have no antigens in their blood, so no antibody will be able to detect the transfusion, therefore, they can donate blood to every other person with any blood group.


Luckily, I had studied all this in my extra coaching, so I know that.

 

[P Squared]

If O- blood group people are universal donors then does that mean that anyone can take their blood?

 

[Varun]

If O- blood group people are universal donors then does that mean that anyone can take their blood?

Yes. But the O- blood group itself is very rare.

 

[Abhas]

If O- blood group people are universal donors then does that mean that anyone can take their blood?

Not anyone, but only people with the negative RH factor.

Yes. But the O- blood group itself is very rare.

Negative blood group is rare itself.

AB people can receive blood from anyone in their RH factor. That makes them so lucky! (Not that you should ever need it, but just in case you do, the person needn't worry about finding a donor of a particular bloodgroup.

O are actually the unluckiest, because they can receive only from O.

 

[Varun]

Not anyone, but only people with the negative RH factor.

No, everyone.
A Rh+, A Rh-, B Rh+, B Rh-, O Rh+, AB Rh+, AB Rh- and O Rh- (themselves).

O Rh+ ones can donate blood to only the ones with Rh+ blood group, they (Rh+) have an additional antigen from the Rhesus monkey(I don't know the exact name), which is very rare.

 

[AngryPixel]

Thats not true Abhas. O- can donate to anyone(+,-). But O+ can donate to only +ve. Take a look here

Similarly not the entire O group is unlucky. The O- is unlucky as they are just 4% of world population and can take blood from O- only. Whereas O+ is 36% of world population,so you can get it easily.

Rarest group is AB- which is just 0.45% of world population. But they can receive from O-,A-,B- and AB-. That makes their receptor group approximately 10% which is more than O-.Thus even though they are rarest they are not as unlucky as O-.

 

[Abhas]

Thanks for the heads up guys.. Thought it was the other way round.

So in conclusion, AB+ can receive from everyone, and O- can donate to anyone.

 

[deathrevenge9]

I am an O+.

 

[AngryPixel]

Don't be sad, it the O- who should be worried.

 

[AkshayC]

Let say a person is having blood group O -ve and his parents are group A also his brother is group A. How he came to be that blood group ?

 

[ste_mc_efc]

Let say a person is having blood group O -ve and his parents are group A also his brother is group A. How he came to be that blood group ?

recessive alleles.

basically each parent will have two genes, one dormant and one expressed.

Either can be passed on, so if both parents have the recessive alleles for blood group O- (although they both express group A) a child can still have blood group O-

Think of A is blood gorup A and a is group O-.

The single A]a along the top of the rows and side of the column represents both heterogenous parents (that is to that they both have two different gense)

 

[Dipak]

I am AB+...
Can take blood from anyone

 

[AbhishekS]

Do the lack of antigens affect O- people?

No.