Why is there no blood type C Z?

This should start with the ** of ABO blood type. In 1900, K Landsteiner, a researcher at the Institute of Pathology in Vienna, Austria, found that the cause of blood transfusion failure was due to the condensation of red blood cells in some people's serum, but not in others. The following year, he took blood samples from his colleagues, tested them for red blood cells, and found that they had two types of antigens, which he named A antigen and B antigen.

Blood with a A antigen is called type A, and if it has a B antigen, it is called type B, and there are no two antigens; It was called type C or zero (later renamed type O). So far, there are two subtypes of type A, and the others have not been detected in this range. Of course, there are various other blood types such as RH, MN

and XG and other blood types. So there are no blood types in the back.

The left methyl group in A is better than hydrogen, the right chloromethyl group is better than the methyl group, the methyl group and the chloromethyl group are on the same side, so it is Z type, the left methyl group in C is better than hydrogen, and the first two methylene groups on the right side are the same, compare the third, the top is fluorine, the bottom is carbon, and the fluorine atomic number is large, so the fluoromethyl group is better than the butyl group, not to look at the length of the carbon chain, only to compare which has the better group first.

Blood types include blood type A, blood type B, blood type AB, and blood type O. Less common are various other blood types such as RH, MN

and XG and other blood types.

Perhaps in the future, with the deepening of blood group biology research, new blood groups can be subdivided and discovered.

Our common blood type is ABO, in fact, there are many kinds of classification, according to the type of antigen adsorbed on human red blood cells, but the number of ABH antigens is relatively large, so this blood type is dominant, I don't remember very clearly, there are about 50 kinds of blood group classification.

I don't know how to tell you, your question is a bit of a bull's horn, this is just the first discovery of blood type, the scientist's naming habit is determined, he can be named at will, such as as you said c d e .Type Z, but he's a science; Home, there is also his logic in doing things, so he started with AB, in fact, he named it so There is a deeper meaning, people with blood type A only contain A antigen, people with blood type B only contain B antigen, and people with type AB contain both A and B antigens, but type O blood does not contain both, that is, the meaning of 0 in mathematics, from this way we can understand that this scientist has good intentions, he is designed so for the convenience of those of us who come after us to remember these medical knowledge! Personal humble opinion, don't laugh at peers, if this classmate agrees with my statement, he will adopt it! Everyone has a blood type ** formula, if you need it, you can take a look!

Those with special blood types account for a very small proportion.

There are 4 blood types in humans. A b ab o is just a medical synonym, and if the original namer identified one of the blood types as C, there would also be C. Anyway, it's just for the sake of memory.

This is because there was no type C when blood type was first discovered.

Blood types are divided from ABO: only type A and B

type, AB and O, no blood type C. Other classifications, such as Rh-negative and Rh-type.

When you're that it's just not, it's okay!

There are different types of blood, which were proposed by the Austrian pathologist and immunologist Carl Landsteiner (1868-1943) in 192. He had taken blood samples from himself and five colleagues and synthesized 30 samples for observation. He found that some samples were mixed successfully, while others were condensed (stuck together).

He then realized that not all samples were the same. In the samples of two people, the red blood cells had a substance called anti-gen (antigen) on them, which he labeled with A. The samples of the other two had another antigen, which he labeled alphabetically with b; There was only one person who had no antigen A or B antigen, but there were two antibodies in the serum, as did his own blood, which he labeled with O (which means no antigen). Later, he found that there was a group of people whose blood had both A and B antigens, and he called it AB type.

Since then, blood has been divided into types A, B, AB, and O.

So there are no ...... types C, D, and EBlood.

Because human beings have 23 pairs of chromosomes and n pairs of inherited genes, the corresponding genetic characteristics of each person are different according to the difference of each pair of genes. Among them, there are dozens of pairs of genes related to blood type, so blood can also be divided into several blood types (generally two, dominant and recessive) according to the characteristics of each pair of genes. Therefore, there are n ways to classify blood groups, and the most common pair of genes is the ABO blood group gene, which divides human blood groups into AB, A, B and O.

This is followed by the Rh blood group gene, which divides human blood groups into Rh-positive and Rh-negative.

The ABO blood group gene is slightly different from the ordinary gene, it has two dominant genes at the same time, A and B, and a recessive gene I, the so-called recessive gene means that if there is a dominant gene, the recessive gene will not manifest itself. So this pair of alleles has a total of six combinations according to the permutation, AB, AA, AI, BB, BI and II. The recessive genes in the basal AI and BI do not manifest, but only show the dominant A and B gene traits, so a total of four blood groups are expressed:

Type AB, A, B, and O (purely recessive).

The Rh blood group gene is relatively simple, the dominant gene Rh+, the recessive gene is Rh-, the gene alleles Rh+Rh+ and Rh+Rh are dominant, or positive, and Rh-Rh- is Rh recessive, or negative.

It's not that there is no blood type C, it's just that the naming has been changed in scientific research! In fact, the blood type O that we are talking about now was named type C at the beginning, and it was later changed to type O!

No, and it can't. That's genetically determined by humans.

It's just a symbol used to identify and memorize blood type, and the reason why it's ABO instead of ABC is that the answer lies with the person who discovered the blood type.

Because there are very few people with blood type C, almost none.

The average person is an ABO

It was originally C, but later it was changed to O

Because the genes that determine a person's blood type are a, b, i

When the gene is AA or AI is blood type A.

When the gene is BB or BI is blood type B.

When the gene is AB, it is AB blood type.

When the gene is II, it is type O blood.

The blood type is antigen and antibody.

A classic example of specificity. Erythrocyte.

There are more than 100 blood types, and the ABO blood type we are most familiar with is just one of them. The proportion varies according to ethnicity, with the highest proportion of O-type accounting for about 44%, type A about 27%, type B about 23%, and type AB about 6%. Blood type refers to the antigenic molecules that are present on the surface of blood cells.

People with type A have a antigen and people with type B have a B antigen; At the same time, people who have both are AB type, while people who have neither are O, which means zero. According to the principle that the same pair of antigens and antibodies cannot exist at the same time, people with type A have no A antibodies in their plasma but have B antibodies, while people with type O have A antibodies and B antibodies in their plasma, and so on. This characteristic is the principle of blood group testing, and it is also a consideration for blood group selection during blood transfusion.

ABO blood type is determined by genetic inheritance, and each blood type (phenotype) has a pair of genes (genotype).

According to Hastelloy Medical Biochemistry, there is a section of **blood group in it. The ABO blood type, the most common blood type in humans, is actually a problem of antigen carrying, and blood clotting will occur when the wrong blood is transfused, resulting in death. People with type AB can receive other types of blood, but only blood transfusions can be given to people with type AB; People with type A or B can receive blood of the same type or type O; People with type O can only receive type O blood.

The inheritance of blood group is controlled by a pair of genes, which have three types, namely A and B, which are dominant to each other, and type O, which is recessive. If an individual's blood group genes are A and B, they are AB people; A person with a genotype of AA or AO is a person with type A; Type B people have either BB or BO; People with type O carry two recessive O genes. If you look at the proportion of the population by blood type, it should be ab:

a:b:o is 2:

However, the distribution of blood types in the population is that people with type O are the most abundant, and people with type AB are the least.

That's right, AB is the least of the blood types. In addition, if there is no D antigen on red blood cells, it is commonly known as Rh-negative blood type. Otherwise, it is positive blood.

Therefore, the Rh-negative AB blood type is very rare. 1% of Oriental people are rh-negative and bloody; In the West, it is 15%.

No, there are currently only four blood types which are ab a b o.

There may or may not be. Because there are no people with Z blood type in the world, only A, B, and O types.

There are only 4 types, as he said.

Haven't heard of it. In general, people's blood types are divided into type O, A, B, and AB.