妈妈和儿子的dna不同吗

Ning Cheng quickly put away the jade box and said to Xian Caixue, thank you so much, Junior Sister Xian. I won the first place thanks to your spot. If there is a pill here, I will give it to you. If there is a reward for the first place, please help me collect it, Senior Sister Xian. If not, forget it. I have something urgent to go to now....