"½¹½ºÂù¸" <yfshun2 at pd.jaring.my> wrote in message
news:93r436$mg0$1 at news5.jaring.my...
> Hi! Everybody!
> I have a question here which really confuse me. May I ask, If
> couple with blood group 'AB' and 'B', is that possible that they will give
> birth to a baby with bllod group 'O' ???? In this world, will this happen
> Or may be already happened ??? I a bit confuse coz during my school time,
> the lecturer told me that people with blood group "AB" and "B" will only
> give birth to baby with blood group "AB", "A" and "B". So, under what
> circumstances that a baby with blood group "O" will be born beside having
> parents with blood group "O" ????
> I hope someone with this kind of knowledge can advice me on
> problem. Thank you very much !
>This is an intro biology question, really somewhat off topic for
a neuroscience news group.
But, anyway, a person with blood type AB will carry one 'IA' allele
and one 'IB' allele. A person with blood type A will carry one 'IA'
allele and either a second 'IA' allele or a 'i' allele.
In the first case, the children will be either A or AB. In the second
case the children will be either A or B.
If you don't understand that, then you had better review the notion
of a monohybrid cross, of genotype and phenotype!