Studies have shown that genes determine the time of death, but is this really the case?

As soon as a person is born, it actually means death, but for the time point of death, it is an irregular pattern. For a long time, human beings have been studied, but so far have not found an accurate answer, some people die very early, some people die very late, according to today's human records, more than 100 years old is considered the limit of human beings, but after scientific research theories show that in fact, human life expectancy is not limited, so to say that life has an "end", according to this is a theory, it is wrong. From the National Institutes of Health through the analysis of 1,200 samples found that genetic changes may have a certain relationship with human lifespan, unexpected genetic mutations may also lead to the "length" of lifespan, why do we say so, let's take a look at the situation.

Genes have an effect on human deathGenes are almost not the same for everyone, but changes in genes do have an impact on human death, but this is not an absolute statement, that is, genes can only determine part of the time of human death. According to American researcher Du Jing, from the perspective of genetics, genetic factors account for only 30% of human death, and 70% of the factors are affected by external influences, such as accidents, personal physical state, living environment and other factors, so we can't generalize that genes determine the time of human death.

But there are certain factors in this, because from a genetic point of view, genes do determine some physical problems, as everyone often says, some people have been very good in physical fitness, some people have been very poor, which obviously has a certain relationship with genes, but from a genetic point of view, genetic factors only account for 30% of human deaths, and there are no more cases. And scientists have also discovered a genetic change factor that determines human death, which is what we often call "longevity genes", which also has an impact on human death.

Of course not, it is his physical condition that determines the time of death, and if he can maintain his body well throughout his life, then he will definitely live for a long time.

No. Because genes can only roughly determine the time of death, and the lifespan of human beings is also affected by lifestyle habits and external factors, this is not always the case.

Gametes with lethal genes are unable to form zygotes with another gamete, or the embryo cannot survive due to the expression of lethal genes at this stage of embryonic development. Not related to accidental death.

Lethal phenomena of genes: refers to the death of gametes or individuals due to the presence of certain lethal genes.

Common types of lethal genes are as follows:

1. Gamete lethality: refers to the phenomenon that lethal genes act in the gamete period, so that they cannot form viable gametes.

2. Zygote lethality: refers to the phenomenon that lethal genes act in the embryonic stage or larval stage, so that they cannot form live larvae or early death of individuals.

3. Recessive lethality: refers to the fact that when recessive genes exist on a pair of homologous chromosomes, they have a lethal effect on individuals. For example, the albino gene (BB) in plants makes plants unable to form chlorophyll, so plants cannot photosynthesize and die; The genotype of a normal plant is BB or BB.

4. Dominant lethality: refers to the lethal effect of dominant genes, usually dominant homozygous lethality (DD). For example, human gliosis (** malformed growth, severe mental retardation, multiple tumors and other symptoms).

Genetic lethality refers to the death of an embryo or individual containing a certain gene, or the sterility of gametes containing a certain gene.

Heterozygous self-breeding, if the offspring is killed by dominant homozygous traits, the offspring trait segregation ratio is 2:1, and if the offspring is killed by recessive homozygous traits, the offspring traits are all dominant.

In layman's terms, it's an essential gene for running a family, and if this gene is knocked out, or mutated, the cell is going to die.