What Are the Odds of Blood Type Inheritance from Parents?
As we all know, some traits of parents can be inherited by their children, with the most common ones being blood type and appearance. Generally speaking, our blood types are classified into ABO types and the less well-known HR type. The blood type of a child is mainly controlled by the genes of their parents and is even determined by them. For instance, if both parents have type O blood, then the child's blood type is likely to be type O as well.
Blood type is a classification based on the differences in the surface antigens of human red blood cells. Blood is divided into several types due to the different agglutinogens contained in human red blood cells, hence the term "blood type". There are many types of human blood, and each blood type system is determined by genetic factors and has immunological characteristics. The most common blood type system is the ABO blood type, which is divided into four types: A, B, AB, and O. The second most common is the Rh blood type system, which is mainly divided into Rh-positive and Rh-negative. The MN and MNS blood type systems are also important. According to current clinical testing at home and abroad, more than 30 types of human blood have been discovered.
Blood type (blood groups; blood types) is a genetic trait expressed in the form of blood antigens. The genetic system typically remains unchanged throughout a person's life. Human blood types are usually classified into four types: A, B, O, and AB. The inheritance of blood type is facilitated by chromosomes in cells. Human cells contain 23 pairs of chromosomes, with each pair consisting of two single chromosomes, one from the father and the other from the mother. The main component of chromosomes is deoxyribonucleic acid (DNA), which determines genetic traits and functions. DNA can be divided into many small segments, each with a specific genetic trait and function. These small segments are called genes. The small segments of DNA at the same location on the two single chromosomes in a pair of chromosomes are called alleles. The gene loci of the ABO blood type system are located on the 9th pair of chromosomes.
Human ABO blood types are controlled by three genes: A, B, and O. However, each pair of chromosomes in a human cell only carries two ABO system genes, namely one of the pairs of alleles AO, AA, BO, BB, AB, or OO. Among them, the A and B genes are dominant, while the O gene is recessive.
