11 . DNA has been traced back over 300,000 years ! When African- American , South-Caroliner , Alfred Perry died in 2013 , analysis of his DNA revealed that his male lineage probably separated from all others about 338,000 years ago . Considering that the first anatomically modern human fossils date back only 195,000 years , discovering that Perry ’ s Y chromosome had been passed down intact since 140,000 years earlier suggests that his Y chromosome may have been inherited from an archaic human population .
12 . It would take a person typing 60 words per minute , eight hours a day , around 50 years to type an entire human genome .
13 . A human genome is 6.4 billion letters ( base pairs ) long . That ’ s a lot of A ’ s , T ’ s , C ’ s , and G ’ s !
14 . ‘ Cloning ’ is the process of using DNA from one specimen to create an identical organism . The first successful cloning of an animal was on a tadpole back in the 1950 ’ s , however , Dolly the Sheep , named for singer-songwriter Dolly Parton , became famously known as the first in 1996 .
15 . Identical twins are considered to be ‘ natural clones ’ because they come from genetically identical ‘ copies ’ of the same DNA . Any differences between identical twins can be attributed to environmental factors that lead to chemical modifications of the DNA ( epigenetic changes ).
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