The researchers found that there are three types of nucleotide genes in humans: AA type, AG type and GG type  A person has a 36% chance of being AA, a 48% chance of being AG, and a 16% chance of being GG  Of the 1200 elderly people who took part in the study, those with the AA and AG genotypes all died before 11:00, while almost all those with the GG genotype died around 6 pm
When death approaches, people revert to a more natural induction of circadian rhythms
 Based on this, the researchers believe that people with the GG gene type will die an average of seven hours later than others