This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development period- week 1,2,3,4, Subject name: Anatomy
[{'content': 'Which of the following events is involved in cleavage of the zygote during week 1 of development? \nSelect and explain. \nA. A series of meiotic divisions forming blastomeres, B. Production of highly differentiated blastomeres, C. An increased cytoplasmic content of blastomeres, D. A decrease in size of blastomeres', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cleavage is a series of mitotic divisions by which the large amount of zygote cytoplasm is successively paitioned among the newly formed blastomeres. Although the number of blastomeres increases during cleavage, the size of individual blastomeres decreases until they resemble adult cells in size.', 'role': 'assistant'}]