Human DNA is most similar to chimpanzees. Within three billion nucleotide bases, only about 20,000+ genes make us unique as human beings. Human genes are not static, and change over time. Twenty years after the separation of identical twins, their genes no longer matched! Identifying abnormal genes in chronic disease is often an observation, rather than a diagnosis of the cause.
https://www.youtube.com/watch?v=WbG6mzYUnyU&feature=youtu.be&fbclid=IwAR07cSRiUzBpr1LyW6_XXDtifWuQI9z0N3RTdP37Hv9HXv6oyu1qvRAe1gg