<prompt> Which of the following events is involved in cleavage of the zygote during week 1 of development?A series of meiotic divisions forming blastomeresProduction of highly differentiated blastomeresAn increased cytoplasmic content of blastomeresA decrease in size of blastomeres  <response>: 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. 