I was just wondering if both parents are B+ will their daughter also will have a B+ blood type?

Answer 1

That is not always the case.

If both parents are B+, this means that their genotype could be:
BO or BB.
And since they are Rh+, their genotype may be:
RR or Rr/rR.

If both of them are BO, their kids have the following possible genotypes:
BB, BO, BO and OO. (75% B and 25% O)
But if one's a BO while the other is a homozygous BB then the possibilities are BB and BO in the ratio of 1:1. meaning a 100% B offspring.

The same theory applies for the rhesus factor.

To know if the parents are homozygous or heterozygous, trying looking at the blood types of the other children, the parent's parents and their siblings.

For example: *real life by the way*
My dad's a B+ while my mum's an O+. How do i find out if my dad's a BO or a BB since both possibilites are equally valid?
If my dad was a BB and my mum an OO(which is the only possible genotype for an O+ person) then all of their kids would be BOs meaning 100% B+ offsprings.

I'm a B+ but my sis is an O+. this can only mean that my dad must be a BO and not a BB. (or that my sis was adopted, which is not true.)

genetics in action. cool isnt it?

Answer 2

Normally, a child will have the same blood type as the mother...

Othewise the blood type of the mother could reject the unborn
child..., an create a natural abortion

In some very rare cases the feotus may have a different rh...
the mother has to undertake some regular blood transfusions or similar medical therapy until the child is born....

Answer 3

not necessarily.

The B part means that the parent have AT LEAST one gene B, but the other gene can be O...
So the kid can also be O
And the + thing is even more complicated. Let's just says that if one parents is + , they can have children + or -, but parents who are both - can only have - children.

so the kid could be B+, B-, O+ or O-.

Answer 4

Not always.The actual genotype of a B group isis IB/IB or IB/IO (or IO/IB) which indicates that if both the parents have IB/IO(or IO/IB )genotype then the offspring may get one IO from a parent and another IO from another parent which makes him/her blood group O.(IT IS WRITTEN IB/IO(or IO/IB) YOU CAN ALSO WRITE O/O OR O/B(OR B/O).
YOU DID NOT MENTION THE RHESUS FACTOR.
SO,taking both +ve and -ve blood groups into consideration the kid may be B+ or O+ orB- orO-.

Answer 5

Yes, but I would check what the postman's blood type is also, just in case.

Answer 6

Not necessarily, like Finndo explained. Give him da 10 pts.

Answer 7

it can be B+, B- or O+ or O-.

cant be A or AB

as simple as this

actually the + is far more probable than -

Answer 8

yeah most likely

Answer 9

She should.