In real life, ordinary people often have little understanding of family affection. \”I don\’t look like my parents. Is that someone else\’s blood?\” \”I have blood type A and you have blood type B. Why does our child have blood type O?\” These paradoxical questions lingered in my mind, adding to the confusion. After some thought, could it be possible that I would drag my wife and children to do a paternity test? In fact, as long as you know more about genetics, you won\’t make ridiculous jokes. Question 1: Unlike father and mother, whose child is this child? Positive answer: The child does not look like his parents. This does not mean that the child is not his own. appearance, height