What blood group and RH Factor will my baby inherit?
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14 comentarios Lola Rovati@LolarovatiWhen the baby is born, a drop of blood is extracted to know the blood group and the RH factor that has inherited from its parents.It is not so simple to decipher it because it is not determined according to the combination of groups that the parents have, so we will explain below some genetic laws that will help us to know what type of blood group and RH factor can inherit the baby.
Often, the baby's blood group can be surprising since it does not correspond to any of their parents, but it will depend on the genetic information that inherits each of them, since each person has two alleles from their father and his mother.
Blood groups
A blood group is a classification of blood according to the characteristics present in the red blood cells and in the blood serum.The two most important classifications in human beings are antigens (A, B, O) and the RH Factor.
En Bebés y más¿Qué es la incompatibilidad Rh?There are some basic notions of genetics that we must know to better understand the inheritance of blood groups:
What blood group will the baby have?
With what has been explained above, we can see that the inheritance of the blood group is not as simple as knowing the parents of the parents.
Each father will give his son one of his two alleles.The possible combinations between the four inherited alleles (two of the father and two of the mother) give us 16 possibilities, which will determine the inherited group.For example:
Father Group B:
Father Grupo Ab:
Father Group 0:
Recall that an allele of the gene that determines the blood group is inherited from the father and the other of the mother, but they, in turn, will be able to transmit randomly, one of the two alleles they have in their genetic endowment, which will be representedIn the gamete, ovule and sperm.For this reason the children of the same couple can have different blood groups, depending on the allele transmitted by each parent.
The combinations give rise to different examples of inheritance of blood groups according to the way in which this inheritance occurs.
What RH factor will the baby have?
In addition to blood groups, all people have a positive or negative RH factor depending on the characteristics of their blood.
The RH of the blood is determined by an antigen that is found on the surface of the red blood cells or also known as red blood cells.These are the most common type of cells found in the blood and that are the main source to transport the necessary oxygen for our body.We are positive RH if the antigen is found in our blood and negative Rh if we do not have it.
En Bebés y más¿Qué grupo sanguíneo tendrá mi hijo?The HR inheritance consists of two genes, one is inherited from the mother and the other of the father and follows a common pattern.The positive RH gene is dominant, that is, even when combined with a negative RH gene, the positive prevails.Therefore, most people (85%) are positive RH.
Rh factor inheritance:
Mother RH+(++), between parentheses alleles inherited from the parents:
Mother Rh+ (+-):
Rh factor inheritance probabilities
As we see, there are nine possibilities of RH factor genetic inheritance that give rise to different probabilities, as the case may be:
Now, about RH incompatibility or RH sensitization, this can only occur when the mother is a negative RH factor and Father RH positive (cases 4 and 7).If the baby inherits the father's positive RH factor, the newborn hemolytic disease occurs.The mother's immune system can "attack" the red RH factor of the fetus causing anemia, jaundice and even fetal death.All this we have already detailed widely when we explained what is incompatibility RH.
En Bebés y másLa historia del hombre que salvó la vida de más de dos millones de bebés gracias a "su brazo de oro"In babies and more |What RH factor will the baby inherit? What blood group will my son have?
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