Is it accurate to judge the parent child relationship based on blood type, or is it accurate to do D

There are generally only 4 types of blood types, which can only be excluded and cannot be determined when used to judge blood relations. Identical blood type can neither be ruled out nor ascertained. DNA is a permutation and combination of inherited genes, and its identification accuracy is theoretically achievable, and there is no list of errors in the world in practice.

Therefore, DNA identification is not paternity, that is, absolute non-paternity.

Because there are only four ABO blood types, and there are many people, it is common for the same blood type to be the same. The DNA test is to detect the similarity of the DNA sequence between parents and children, generally detecting 16 loci, according to the probability calculation, the accuracy should be in.

There are only a few blood types, but there is a little combination, for example, two blood types O will not give birth to a child with type A or B. But it can only be used for exclusion, not for verification. DNA identification is relatively accurate, and the accuracy rate is generally given in the report, for example.

Blood type represents only one of many genetic loci, and although it has a certain reference role, it cannot be used as a criterion for judgment.

Only DNA identification is fundamentally demonstrated through the combination of genetic theory and molecular biology technology, and is the most accurate and scientific identification method.

DNA identification results are by far the most accurate identification method available. It is not possible to determine whether there is a blood relationship by blood type.

If you don't understand, you can look at the map.

Of course, the DNA is accurate The same blood type does not mean that there is a parent-child relationship There are four blood types in total, and there are many people with the same blood type.

DNA, of course. Blood type is too general.

Judged according to the table of genetic patterns of blood type.

As shown in the figure below, when both parents have blood type O, the child will have blood type O and will not be blood type A, B or AB.

In general, the inheritance pattern of blood type is as follows.

Parental: type A + type A, offspring possible: type A, type O, offspring impossible:

Type B, type AB parents: type B + type A, offspring maybe: type A, B, AB, O, progeny is not possible:

No parental: type B + type B, offspring possible: type B, type O, offspring impossible:

Type A, AB parent: one or both are AB type, offspring maybe: type A, type B, AB type, offspring is not possible:

O-type parents: type A + type O, offspring possible: type A, type O, offspring not possible:

Type B, AB type parents: B type + O type, offspring possible: B type, O type, offspring impossible:

Type A, AB type parents: O type + O type, progeny possible: O type, progeny impossible:

Type A, Type B, Type AB Description: Blood group identification and DNA identification are two different things, ABO blood type alone can not determine who the child is, ABO blood type can only play a role in exclusion under the premise of ensuring the accuracy of blood group detection, and cannot be identified. DNA identification is now the only way to determine a personal relationship.

Bethune Genetic Medical Center, PLA Professional Paternity Testing Center.

Hello, the blood type of parents and children is regular, and the following is a table of blood group genetic rules for your reference:

Table of genetic patterns of common ABO blood groups.

Couples children.

a＋a a、o

a＋b a、b、o、ab

a＋o a、o

a＋ab a、b、ab

b＋b b、o

b＋o b、o

b＋ab b、a、ab

o＋o oo＋ab a、b

ab＋ab a、b、ab

If the blood type of both husband and wife is A B, there will be no type O, and so on.

Your words seem a little stronger than illiterate.

Paternity testing generally requires blood drawing (if the person has passed away and other special circumstances, other tissues such as hair can be used instead), but the main thing to identify is not blood type, but genetic DNA, which is far more difficult to detect, method, and time required than blood group identification, and the accuracy is much higher than that of blood group exclusion, and the cost is much more expensive.

It is entirely possible that a parent with the same blood type is not biological, and a parent with a different blood type may be biological.

Paternity blood grouping is done to see if the genes of the child and the parents are heritable.

Is it a lie to do a parent-child identification and fingerstick blood collection?

According to the standards of the medical community, whether the two parties have a parent-child relationship cannot be determined by blood type, only DNA identification prevails.

DNA paternity testing in medicine is based on Mendelian principles of genetic segregation. According to this law, when gametocytes are formed, pairs of alleles separate from each other and enter their respective gametocytes.

The sperm and egg cells are fertilized to form offspring, and the child's two genomes, one from the mother and the other from the father. Therefore, the paired alleles are one from the mother and the other from the father, and if the identification results conform to this law, paternity is not excluded; If not, paternity is excluded (except in the case of variation).

Strictly speaking, ABO blood group has a certain reference value, but can not be used as the basis for parent-child relationship, and the conventional coagulation phenomenon is only the phenotype of genes, only DNA identification is fundamentally demonstrated through the combination of genetic theory and molecular biology technology, it is the most accurate and scientific identification method, it can only rule out the possibility of parent-child relationship in some special circumstances, but how to see it requires some simple biogenetic knowledge.

Hello, at present, blood grouping can only be used as a method of paternity testing, but it is only a rough method and cannot accurately determine whether the paternity relationship is established.

I don't know how to read here.

Because children are genetically influenced by their parents, there is also a link between a child's blood type and their parents. For example, if a parent has blood type O, the blood type of the child born must be type O, and it cannot be type A or B. However, if you want to determine paternity, you still need to do a DNA paternity test.

Can be O-type.

In fact, there are types A, B, and O in the ABO blood group of people, so the blood group genes of people are IA ib and I (it is okay to think of it as IO), where blood type O is recessive, AB is dominant, dominant and recessive together, dominant (i.e., a person with type A, then her gene is IA IA or IAI or a person is type B, then her gene is IBIB or IB I) two complete dominant blood types or A and B (IAIA and IBIB) together.

Their child is AB, but if the same phenotype is also type A and B, but the genotype is IA, I and IBI, the child born can be type A, type B, type O, all are fine.

In this way, the blood type can still be used as the basis for paternity testing, I don't know if you understand it, but what is certain is that a couple has type A and one is type B, and their children can be type O.

To a certain extent, blood type can make a preliminary judgment on paternity testing, but further tests are needed to further determine whether it is paternity.

A type A and a type B can have a type O child, but this is only one of the cases, and it may also be type A or B, but if the child is type A, it can be determined that the child is definitely not born to the couple, unless there is a genetic variation.

Hehe, I hope it helps.

ABO blood group has a certain reference value, and the combination of genetic theory and molecular biology technology can be demonstrated.

I can tell you this very clearly if a couple one is.

If type A is type B, then they will never give birth to a child with blood type O, because their child can only be type A or B or AB.

If it is the same blood type, it is not necessarily biological, and it is best to do a paternity test to see how well the genes match.

No. The genetic law of blood type is mainly as follows: parents of type A and B can give birth to children of blood types A, B, AB, and O; Parents of type A and O can give birth to children of blood type A and O; Parents of type B and O can give birth to children of blood type B and O; Parents with type AB and O can have children with blood types A and B; Parents with type AB and A can give birth to children with blood types A, B, and AB, and parents with types AB and B can have children with blood types A, B, and AB.

In this case, first of all, there is indeed a genetic law of blood type. If it conforms to the laws of heredity, it does not mean that it must be a biological child. However, if the blood type does not match, then it can be directly stated that it is a non-biological relationship.

All in all, there is no scientific basis for judging paternity based on blood type, so blood type is not a direct way to determine the diagnosis of paternity, but it can be screened to a certain extent. The most accurate way to determine the paternity is to conduct a DNA test through a professional forensic institution.

Of course not, only DNA. Whether there are chromosomes in the blood type.

Scientific things must not be doubted. DNA is a scientific method of identification.

The ABO family of blood groups can only be used to rule out, not to determine.

Paternity testing is the use of forensic science, biology and genetics theories and techniques to analyze genetic characteristics from the morphological structure or physiological functions of offspring and parents, and determine whether the relationship between parents and children is biological, which is the main component of forensic physical evidence identification. To put it simply, it is to determine the relationship between parents and children through blood type or DNA testing, etc. If the parents' blood, hair, saliva, oral cells, and bones are not present, they can be tested.

Blood type is only one of the test items in the paternity test, which includes blood group testing, DNA identification, and chromosomal polymorphism.

DNA paternity testing is currently the most accurate method of paternity, if the genetic locus of the child is inconsistent with the locus of the tested man (at least 1), then the man is 100% excluded from the blood relationship, that is, it is absolutely impossible to be the biological father of the child. If the locus of the child and his or her parents are consistent, it can be concluded that there is a probability of greater than 99 to 99% of the paternity, that is, the existence of a blood parent-child relationship.

Blood type cannot be used as the main basis for DNA paternity testing, and only DNA paternity testing is more scientific and effective.

If you have a very specific blood type, and the particularity of your blood type is hereditary, then the blood type test can have a certain reference. But Director Hu of the Bethune Center for Genetic Medicine said that this kind of situation is very rare and wants to know.

Hello, there is an error in this method of judging blood relations according to the blood type of family members, for example, if both parents are blood type A and the child is also blood type A, then only the father of the child can be judged to be type A.

Paternity test. To sum up, don't reverse cause and effect. At present, if you want to know the exact relationship of kinship, you have to do DAN test (also known as paternity test), by comparing gene series, the more points of the same, the more accurate the paternity relationship.

It is unscientific to determine the blood type, agree with the above statement.

First, parents can be tested using the method of elimination.

Blood type Child's blood type Wrong blood type.

o+o o a、b、abo+a a、o b、abo+b b、o a、abo+ab a、b o、aba+a a、o ab、ba+b ab、a、b、o

a+ab a, b, ab ob+b b, o a, abb + ab a, b, ab oab + ab a, b, ab o If it is normal, there is a chance that the child's biological father and you have the same blood type, then you need to test the DNA.

It is desirable, but it can only be used as a reference, and if you want to confirm 100% of the paternity, you must do a paternity test!

It's not advisable, DNA is the most scientific and powerful, and it's normal for a third party to have the same blood type as yours

If it is determined whether it is the biological father, DNA identification must be carried out to be reliable.

Not very desirable ... There are too many people of the same blood type. If you want to know for sure, do a paternity test.

You can't fully trust this result, you can only assist!

Adopt the scientific method. Go to the hospital.

It is recommended to go directly to the paternity test, insurance.

There is some desirability, and DNA identification is preferred.