One pollen mother cell may produce four germi | vedclass

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(B) single pollen mother cell $(PMC)$ undergoes one meiotic division to produce four haploid microspores (pollen grains).Each microspore then undergoe

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(B) single pollen mother cell $(PMC)$ undergoes one meiotic division to produce four haploid microspores (pollen grains).Each microspore then undergoes a mitotic division to form a vegetative cell (with a tube nucleus) and a generative cell.The generative cell further divides mitotically to form two male gametes (male nuclei).Therefore,the initial production of four pollen grains from one $PMC$ requires only $1$ meiotic division.

One pollen mother cell may produce four germinating pollen grains,each with two male nuclei and one tube nucleus. How many meiotic divisions are necessary to bring this about?

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