A) meiosis
B) mitosis
C) cleavage
D) differentiation
Correct Answer: C
Solution :
Cleavage is a series of rapid mitotic divisions of the zygote which converts the single celled zygote into a multicellular structure called blastula. The cleavage divisions are no doubt mitotic as they produce diploid cells but they differ from typical mitosis in the following manner :Characters | Cleavage | Normal mitosis |
Site of occurrence | In zygote of parthenogenetic egg | In most of somatic cells |
Interphase | of shorter period | of longer period |
Growth | Does not occur | Occurs during interphase |
Oxygen consumption size of daughter cells | High as is very rapid process Decreases | Low as is slow process |
DNA synthesis | Faster | Slower |
Nuclear cytoplasmic ratio | Increases | Remains same |
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