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A macrogamete is the larger, typically female gamete of a heterogamous organism. In plants, this is part of the reproductive cycle, where the sporophyte phase produces gametophytes. The megagametophyte, which arises from a megaspore, is the female gametophyte and produces the egg cell. This contrasts with the microgametophyte, which is the male gametophyte and produces sperm. The macrogamete, or egg, is essential for fertilization, leading to the development of a new sporophyte generation.123456

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