A sperm has just fertilized a human egg in the fallopian tube. Trace the events that the fertilized eggs will undergo upto implantation of the blastocyst in the uterus
Cleavage:- The fertilized egg starts dividing lay specific mitotic divisions called cleavage. The zygotes undergo mitotic division in the isthmus of the oviduct to form daughter cells, the cells formed as a result of cleavage called a blastomere. 2. Blastocyst:- 3-4 days after fertilization, the morula twins into a large mass of cells called blastocyst Outer peripheral cells enlarge & flatten further & form trophoblast. Trophoblast cells secrete a fluid into the interior & form a cavity called the blastocoel. The embryonic stage with blastocoel is called a blastula.