My Blood Group

[scientistsahai]

Hey,

 

My blood gp is 'O' and my brothers gp is 'B' and 'AB'. of the basic knowledge of blood gp alleles that I have, we inherit from parents the type of gp that we possess.

So accordingly, if I reverse engineer it I find that one of my parents shud hav 'A' and other 'B'. When I enquired i found that my mom is dominant and carries B(hence BB)

Thus in that case, with these blood gp's

AO x BB

|

F1 : AB & OB (i.e B)

 

Thus can I conclude that I was one the adopted among all 3 children??? PLease help

[Skye]

What do you mean by 'your mom is dominant'?

 

I imagine your mother is I^Bi and your father is I^Ai.

[scientistsahai]

Yep u can say it like that too. We prefer to show dominance of alleles as 'BB'(homozygous and dominance) and 'bb' (homozygous and recessive) and 'Bb' (as the heterozygous and dominant)

 

So my mother is I^BI^B and father is I^Ai.

[Skye]

Ok, but you still haven't explained why you think your mother has to be homozygous.

[scientistsahai]

Well I actually found that out from her blood gp. And since one of my brothers has an AB type and me O hence there needs to be a heterozygous father so that both A and O alleles can give an AB.

Skye can u please be more elaborate if wanna enquire more ??

[Bluenoise]

Hey' date='

 

My blood gp is 'O' and my brothers gp is 'B' and 'AB'. [/quote']

 

You're probably not adopted. Say one parent is OA and the other is OB this gives the possibility of these combinations in their offspring:

OO

AB

OA

OB

 

O is recessive so they could have sired children with phenotypes O, AB, A and B

So in conclusion without knowing your parents phenotype your siblings could have any blood group.

So one of your parents are probably A and the other is B.

[scientistsahai]

Thanks Blue...

[Bluenoise]

When I enquired i found that my mom is dominant and carries B(hence BB)

 

Sorry I missed that. If you find out that your mom is B then that's OB or BB not just BB.

Sometimes I miss things...