[Campbell Biology P.1084] Which of the following represents the correct chronological sequenc... | Practice Question

Which of the following represents the correct chronological sequence of early human development events as described?

  • A: Fertilization → Ovulation → Cleavage → Implantation → Blastocyst formation
  • B: Ovulation → Fertilization → Cleavage → Blastocyst formation → Implantation
  • C: Ovulation → Cleavage → Fertilization → Blastocyst formation → Implantation
  • D: Fertilization → Cleavage → Ovulation → Implantation → Blastocyst formation

Explanation

The process starts with ovulation 1 , where a secondary oocyte is released. This is followed by fertilization 2 in the oviduct. Cleavage 3, 4 then begins as the embryo moves towards the uterus and forms a blastocyst. Finally, the blastocyst implants 5 in the endometrium.