| 21. | After fertilization the zygote gives rise to ~ 20 sporocysts.
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| 22. | It is not known why some zygotes do not implant.
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| 23. | The zygote undergoes repeated mitosis and differentiation to become a diploid organism again.
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| 24. | The zygotes of the gametes develop into sporangium, which produces haploid spores.
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| 25. | The result of karyogamy is a diploid cell called a zygote or zygospore.
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| 26. | As the zygote divides and grows, it does so inside the archegonium.
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| 27. | Two gametes fuse to form a zygote which develops into a new sporophyte.
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| 28. | The exact cause for the splitting of a zygote or embryo is unknown.
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| 29. | Next the zygote forms a macrocyst characterized by a surrounding extracellular cellulose sheath.
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| 30. | Within the macrocyst the diploid zygote undergoes meiosis followed by successive mitotic divisions.
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