(B) In humans,the zygote undergoes holoblastic cleavage,which is unequal. The first cleavage division results in two blastomeres of different sizes: o

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(B) In humans,the zygote undergoes holoblastic cleavage,which is unequal. The first cleavage division results in two blastomeres of different sizes: one slightly larger and one slightly smaller. This is due to the distribution of cytoplasmic components and the nature of the isolecithal egg.