Both parents have blood type A, the daughter is type A, and the son is type O, is this in line with

Genetic patterns of blood groups - Table of genetic patterns of blood groups.

Parental blood type Blood type that the child will have Blood type that the child will not have.

o with o o a, b, ab

a with o a, o b, ab

a with a a, o b, ab

a and b a, b, ab, o ——

a with ab a, b, ab o

b with o b, o a, ab

b with b b, o a, ab

b with ab a, b, ab o

ab with o a, b o, ab

ab with ab a, b, ab o

The locus of the ABO blood group system is on chromosome 9. Human ABO blood group is controlled by three genes: A, B, and O, but there are only two ABO system genes on chromosome 9 in each human cell, that is, a pair of alleles in AO, AA, BO, BB, AB, OO, where A and B genes are dominant genes and O genes are recessive genes.

Yes. The human ABO blood group system is controlled by three complex alleles, ia ib i. The IA ib is co-dominant, and they are both completely dominant to I.

If both parents are of the IAI genotype, the daughter with type A is IAI or IAIA, and the son with type O is II.

How can it be genetic, this bull's head is not in the horse's mouth, his parents and sisters are all type A, and he is the only one who is type O, is he a freak?

Aciba... Take him to check his DNA...

It's normal, cherish your family.

I ask you: Both parents have blood type O, why do children have type A?

Genotype refers to the true genes that a person has that determine a certain trait, and phenotype refers to the traits that a person exhibits. In the example of blood type (phenotype), genotypes AA and AB make a person exhibit the phenotype of blood group A, and similarly, genotypes BB and BO exhibit the phenotype of blood group B. A person with blood types O and AB can only have one genotype, OO and AB, respectively.

The agglutina produced by the O-type allele does not have special enzymatic activity, whereas the agglutination produced by the A- and B-type alleles has its own enzymatic activity. Therefore, people with the genotype OO have blood type O, which means that the agglutina on their red blood cells does not have any enzyme activity, and the blood will contain lectins A and B.

Lectin A destroys blood cells of type A that may enter the body's blood circulation, and lectin B destroys blood cells of type B. People with the gene AA belong to blood type A because the agglutination on their red blood cells is enzymatically active. People with genotype Ao also have enzyme activity related to allele A, so they also belong to blood type A.

Remember that the o allele does not have any enzymatic activity! People with blood type A have lectin B in their plasma, which destroys the blood cells of type B that enter the body's blood. Similarly, people with genotypes BB and BO are classified as blood type B.

These people have lectin A in their plasma, which disrupts any type B blood cells that enter the blood circulation. As you can see from the above, this is almost impossible to happen. However, some people have a blood type that appears to be type O, but is actually type A, which is caused by a genetic mutation.

According to the standards of the medical community, blood grouping cannot be used as a criterion for whether the parties are related.

Type A, Type O. What does not appear is type B and type AB.

Each individual, at a locus, has two and only two alleles, each from one parent. If the genes from both parents are identical, the individual is called homozygous, or heterozygous if they are not. Whether homozygous or heterozygous, the sum of genes on a pair of chromosomes is called the genetic formula.

For example, the genetic formula of the two types of people is AA and AO respectively. However, not all inherited genes are expressed, and traits that can be expressed are called expressions. For example, regardless of whether the inheritance is AA and AO, its expression is A, which is what we usually call type A.

Visible blood type actually refers to the form in which it manifests.

Probably, from a genetic point of view, if both parents are blood type O, then the child can be type A, B, AB, O, that is, any of the ABO blood group line, so the probability of being blood type A is 25%.

It can't be type A, it can only be type O, and if it is, it's not the parents' biological one.

If both parents have type O blood, the child must have type O. Because the type O gene type is type II, the child's gene is inherited from the parents, that is, only one I gene can be obtained from the father, and only one I gene can be obtained from the mother. Therefore, the child's blood group gene can only be II, then the child's blood type must be type O.

The types of blood types are (A (AA, AI), B (BB, BI), AB (AB), O (II).

Blood type is genetically determined.

The parent's blood type determines the child's blood type, but the child's blood type is not necessarily the same as the parent's.

General ABO blood group system: 1).If both parents are O or AB, the child is O or AB, which is the same as the parents; 2).

Both parents are type A and the child is type A or O; 3).Both parents are type B and the child is type B or O; 4).Parents have types A and B, and children may have types A, B, O, and AB; 5).

Parents are types A and AB, and children are A or B or AB; 6).If the parents are B and AB, the child is A or B or AB.

The genetic law of blood group is:

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→o；

o＋ab →a、b；

ab＋ab→ab、ab。

Therefore, according to the above table of blood group inheritance, if both parents have blood type "A", then the child's blood type is also possible in addition to type A. That is, both parents have blood type A, and the child's blood type may be type A and O.

If you ask, you're skeptical, and then science can have errors and chances, such as evolution, so even if the DNA shows that you and your child don't have the same blood type, it doesn't necessarily mean that he is not your flesh and blood.

It is generally not possible for children with type A blood to have children, and it should only be blood type A.

Unlikely, according to the heritage gene, this blood type rarely appears, so to speak, it is impossible at all!

Haha, it's humorous upstairs, of course, it's possible, it's 1 4, and only one of them is AB blood type, and the child won't be O, if I'm not mistaken.

It may be type A or O, and type B and AB are not possible.

What blood type is the old king next door?

This confidant, according to the law of blood type heredity, the father is type A and the mother is type O, then the child should be type 0 or type A, and it cannot be type B and AB.