Is there always a problem with the children born of a brother and sister getting married? Why do I k

Not all children born of a brother or sister are married. It's just that the probability of malformed fetuses is relatively high for children born of brothers and sisters getting married, and it doesn't say that there must be a problem. The children born to two brothers and sisters when they get married, because the genes are highly homologous, so in the process of gene combination and recombination, it is easy to cause genetic recombination that is originally a vague recessive disease.

together lead to genes that become dominant diseases. In this case, the child is born with a disease. In the case of recombination of genes with distant homologies, the probability of recombination of two genes with the same recessive disease at the same time will be much smaller than that of highly homologous genes.

This is the reason why consanguineous marriages tend to give birth to problematic children. But if the parents of the consanguineous marriage do not have homologous genes, such as mixed-race children, their genes carry recessive genes.

There are very few children born after they get married, and there will be fewer problems, but here there are fewer than the same kind. But it is certainly higher than the probability of having children born from non-consanguineous marriages.

It is not necessarily a problem for siblings to get married and have children, but there are certain risks.

From a biological point of view, siblings getting married and having children are close relatives, and it is possible to introduce the same smallpox virus into the body, causing reinfection with the smallpox virus, which greatly increases the chance of the child getting sick. In addition, there may be some recessive genetic diseases between siblings that have not yet been discovered, and if they marry and have children, there is a high chance that this recessive genetic disease will be passed on to the next generation.

In addition, even if a sibling marries and has children that does not result in an obvious genetic disorder, children may have certain undiscovered genetic defects or physical abnormalities that these children may face as they grow up with many challenges and difficulties.

It should be emphasized that the above is only one of the possible risks of siblings getting married and having children. In some cases, siblings getting married and having children do not lead to the above problems.

In short, there are certain risks and uncertainties associated with siblings getting married and having children, which should be carefully considered. If it is decided that you want to do this, it is advisable to have a detailed physical and genetic test to ensure the health and safety of the child.

This is not necessarily, if the genes of the brothers and sisters are very good, the offspring will not be a problem, but the reality is that most people's genes have individual gene defects, and ordinary people marry when both people have the same gene defects, which will lead to congenital genetic diseases in their offspring, but this probability is lower, and the probability of brothers and sisters is higher.

The children born of marriage are not necessarily problematic, but the probability of having congenital genetic diseases is much higher than that of children born to non-consanguineous boys and girls.