<prompt> Primordial Germ cell develops from?ChorionAmnionYolk sacCord blood  <response>: ANSWER: C Yolk sacREF: Embryology by Ramesh Mathur,Meenakshi Mehta page-38, Color atlas of embryology by Ulrich Drews page 15In mammalian embryo, including man, the primordial germ cells apparently arise from the en do dermal layer near the yolk sacGerm cells arise in the embryonic yolk sac, differentiate in the gonads and pass on the genome as gametes 