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Description:Each microsporocyte undergoes meiosis, forming four haploid microspores, each of which can eventually develop into a pollen grain. Each made the discovery independently of the other. Microgametophyte[ edit ] The male gametophytes, or microgametophytes, that participate in double fertilization are contained within pollen grains. A microspore undergoes mitosis and cytokinesis in order to produce two separate cells, the generative cell and the tube cell. The next sequence of events varies, depending on the particular species, but in most species, the following events occur. Due to the limitations of the light microscope, there were many unanswered questions regarding the process of double fertilization.
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