Lead
According to archaeologists, 150,000 years ago ancient humans had a complete tooth on their skull, and scientists found by analyzing the DNA on the tooth that the mysterious origin of the owner of this tooth contained a gene from a primitive man from Africa.
At that time, human beings did not go out of Africa, only lived in the African grasslands, and did not expect that there would be African primitive genes on this tooth.
This gene cannot be explained by ordinary humans, and this gene is quite different from the DNA of the local inhabitants of Africa, and it has to be obtained from Africans of different eras.
Genetic inheritance of grandchildren
To understand exactly where the genes on this tooth come from, it will take some time to study.
So will the genes of the owner of this tooth be inherited?
Take our modern grandchildren and grandfathers as an example, grandchildren may inherit the genes from their grandfather, but it is also possible that most of the genes come from other people, and it may be that grandpa accidentally acquired them.
Ancestors from 2,000 years ago thought that their genes would be inherited by their predecessors, just as today's grandchildren will definitely have their genes, but perhaps in smaller proportions.
In this case, half of the genes are from the grandfather and grandson, 10% are grandfather's, 10% are great-grandfather's, and 10% of the genes will be the genes of ancestors before 2000.
After confirming that ancestors of different generations leave different genes for future generations, the researchers hope to analyze how many genes there are from ancestors before the 2000s.
The researchers found the grandson, collected his genetic samples, and returned to the laboratory to analyze the samples, which eventually found that 20%-80% of the genes in the grandson's body may have been inherited by ancestors 2,000 years ago.
According to the researchers' summary, starting from the grandfather's generation, the genes in the grandchildren will be reduced, and we can also find from the genes of the grandchildren that 20% of the genes are from other ancestors, and a small number of genes from the grandchildren's generation are from other ancestors, which may be 0.
After conducting research, the researchers found that no one's genes were entirely from their grandfather's genes, and no one's genes were from their great-grandfather's, which was conclusive.
The conclusions reached by the researchers based on different analyses were different.
The genes of grandchildren are mostly the same as those of grandfathers, and there is a possibility that they will decline dramatically in this generation.
The researchers conducted ancestry analysis based on different ancestors, and found that 20% of the genes of grandparents did not have genes from grandfathers, and it was possible that genes came from grandfathers' fathers.
It is also possible that the grandfather's grandfather is someone else's biological father, in which case the grandson has almost no genes from the grandfather.
In the case of great-grandparents, it will be much less, possibly 0.
According to the analysis of the genes of the ancestors of different generations, the grandchildren have 20%, 10%, and 5% of the genes with the grandfather, the grandfather's father, and the grandfather's grandfather, respectively.
Grandchildren and grandfathers' ancestors
If the researcher finds the grandfather's relatives, the content of the study will also change, and the content of the study will no longer be whether the genes of the grandchildren are the same as the genes of the ancestors of which generation.
In this case, the researcher also needs to find the relatives of the grandchildren, and by finding the relatives of the grandchildren, the analysis can finally be concluded whether the analysis between the two generations can be carried out by the parents.
So it's possible that there is an 80%-20% chance that the grandchildren's relatives will also have a chance.
Judging by this situation, the probability between the grandson and the grandfather will be almost non-existent at 20%, which is almost certainly 0.
The analysis of the great-grandfather will be less, and from this situation, it is still possible to be 0, and finally it is concluded that 20% of the genes of the grandson may be 20%.
It could also be 0, and researchers will need to be prepared for time if they want to find their ancestors 2,000 years ago from their grandchildren.
Ancestral genes of grandchildren
So how many genes did grandchildren's ancestors have?
For me, I haven't been in contact since my great-grandfather's generation.
My grandfather also came from somewhere else, so my great-grandfather also came from out of town, and my grandfather was young at the time, so my grandfather didn't know who my great-grandfather was, and I hadn't seen my great-grandmother since I was born.
And when my dad was very young, my great-grandmother died, so my dad couldn't let me analyze it from my great-grandmother.
So I started with my great-grandfather's generation, and no one came to help me.
However, from the analysis of the previous generation, the researchers analyzed and concluded that I have a certain probability of coming from the genes of my great-grandfather, so it can be seen that everyone has their own genes.
epilogue
According to the analysis of researchers, modern people may or may not have the genes inherited by their ancestors 2,000 years ago, so everyone's ancestors are different, and our attention can only be on our current body.