Children share half your DNA. Grandchildren share 0-1/2 your DNA, in a normal distribution around 1/4 Similar values and distributions happen for great and gr

Children share half your DNA. Grandchildren share 0-1/2 your DNA, in a normal distribution around 1/4 Similar values and distributions happen for great and great-great grandchildren centered on 1/8th and 1/16th respectively This is due to the randomness associated with the chromosome from you or your co-parent being randomly selected. A grandchild exceptionally like you might be almost 1/2 your DNA