AP BIOLOGY

Detailed explanation-1: -After all, children inherit half of their DNA from each parent: 50 percent from mom (through an egg), and 50 percent from dad (through sperm).

Detailed explanation-2: -To form a fetus, an egg from the mother and sperm from the father come together. The egg and sperm each have one half of a set of chromosomes. The egg and sperm together give the baby the full set of chromosomes. So, half the baby’s DNA comes from the mother and half comes from the father.

Detailed explanation-3: -Only Parents and Children Always Share an Exact Amount of DNA. So there you have it. Most everyone shares 50% of their DNA with their mom and 50% with their dad. In other words, sons and daughters are pretty much always 50% related to mom and 50% to dad.

Detailed explanation-4: -The calculations assume that every child gets 50% from its mother and 50% from its father and in turn 25% from each of its four grandparents. The actual percentages vary from the average in individual cases. For example, a person might share 27% of his DNA with one nephew and only 23% with another.