Hundreds of minor genetic mutations start to form in the cells of an embryo after conception, some of these mutations occur as sex cells are forming in the embryo. That means they can become part of the embryo's genome and be passed on to the next generation.
This opens up a larger perspective on human development, this shows that some of our genome does not come from our parents.These early genetic mutations are also similar to those found in cancers, cancers can occur as a normal byproduct of cell division, this mat be the causes of neurodevelopmental disorders such as schizophrenia or autism.
These conditions are primarily the result of genetic abnormalities, but no single gene inherited by parents has been found to cause a large number of cases.The study may also help explain why one identical twin might have a genetic disorder while the other is healthy, or why some members of a family who carry a disease-causing mutation do not get sick.
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