from 3.125% to 50%
Assuming no inbreeding, the current descendent would have only 1/64 (less than 1.5%) of his ancestors DNA.
Some of your DNA will be the same! You are likely to have somewhere between 1/8th and 1/16th of the same DNA.
Humans share about 85 of their DNA with mice.
Gorillas share about 98 of their DNA with humans.
Humans share approximately 98 of their DNA with gorillas.
You share about 50 of your DNA with each of your biological parents.
Humans share about 1-2 of their DNA with bacteria.
Humans share approximately 98-99 of their DNA with apes.
Humans share approximately 98-99 of their DNA with monkeys.
Humans and apes share about 98-99 of their DNA in common.
100%
Strangers typically share less than 1 of their DNA with each other.