if i have same blood group as a person does it prove there my biological dad?

Answer 1

No. I might have the same blood group as you and I'm not your dad.

Answer 2

no there are not that many blood groups you need to have a proper DNA test to prove a biological link

Answer 3

NO, but it mean theres a possibiltity, you can do an online dna check and send off for a free sample kit to take mouth swabs and send it off, you only need 1 parents and the child swab - taken int he mouth from the inside of the cheek

you can also checkout this link

http://www.dna-bioscience.co.uk/did_you_know_abo.shtml
this link shows you the blood compatibility chart and tells you who can and cannot be a person parent/father depending on their bllod group but only a dna test can prove actual paternity, being a certain bloodgroup does not mean someone is automatically a parent.
http://www.londonbiosciences.co.uk/ (cheap dna test)



ABO blood types can be complicated to understand. This is mostly due to the fact that the 'O-type' antigen is masked by the presence of an A- or B-type antigen. This is explained in the following chart, showing the different the genotypes that make up the blood types.

Genotype (DNA Blood Type
AO or AA ................. A blood type
AB ............................AB blood type
BO or BB..................B blood type
OO............................O blood type 0

For example, two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types.

Rh Positive (Rh+) and Negative (Rh-) Blood Types

The Rh (+/-) factor is inherited separately from the ABO blood types. Similarly to the masking effect of the O gene in ABO blood types, the Rh negative (Rh-) gene is also masked by the presence of a Rh positive (Rh+) genotype. Therefore, a person may have a Rh + blood type and can still have an Rh - gene (See the chart below). Furthermore, 2 parents with Rh + blood types can have a child with Rh - blood type.

Genotype (DNA) Blood Type
(+ , -) or (+ , +) Rh +
(- , -) Rh -

information provided/original author (no coonection to this listing)
http://www.dna-bioscience.co.uk/did_you_know_abo.shtml

- on a personal note - both my parents are O+ (Positive) and my blood group is Rhesus D negative(O- (negative) this is correct as explained in the above chart, where as my blood group is pretty rare - its more common than rare

Answer 4

Blood group won't prove it, complete strangers can have the same blood group. Only DNA will prove it.

Answer 5

A
ab+
B-
O+/-

either way you cut it, upto 8 blood groups divided between X many billions of humans... ill bet you have the same bloodgroup as half the guys in your street... you need a DNA test to prove it.

Answer 6

Absolutely not! Blood types are shared by most people - there are only a few (I believe 4) - if you want to prove paternity - you must take a simple DNA test - there are kits that use a simple swab from your cheek to gather DNA. Good luck!

Answer 7

no. coz your biological parents don't have to have same blood group as you at all. You'd need a full DNA test to establish that. x x

Answer 8

No. He could have the same blood group but different DNA.

Answer 9

Nope, only 4 blood groups, get DNA test.

Answer 10

No, I'm O negative, but my children are A positive.
The only way to prove a biological father is a DNA test.

Answer 11

blood group alone is not proof - there are billions of people with the same blood group as you but you only have one dad