妈妈和儿子的dna不同吗

Kinoshita Sakuraba stroked the blade and said with a nostalgic tone: This sword is called Kiri. My master Musashi gave it to me since I started practicing martial arts. In the twenty years since I held the sword, I have competed one hundred and fifty-seven times, and I have never been defeated. The next day, I accidentally met Tianqijun while performing a mission, and was cut off by Tianqijun with his sword....