妈妈和儿子的dna不同吗

Are you embarrassed to ask? ! Li Ruonan couldn't help but glare at him. The stone you threw hit Zhang Yongqiang's face. His nose was crushed by you and his front teeth were also smashed. If it weren't for the timely delivery to the hospital, he would I'm afraid they've all lost too much blood and gone into shock now!...