Regarding Sexual reproduction in Fungi, which one of the following is correct?
Correct answer: B. Plasmogamy followed by Karyogamy
- A. Fusion of haploid nuclei and meiosis vary in different groups
- B. Plasmogamy followed by Karyogamy
- C. Karyogamy followed by Plasmogamy
- D. Karyogamy & Plasmogamy occur together
- E. None of the above
Explanation
In fungal sexual reproduction, plasmogamy refers to the fusion of the cytoplasm of two haploid fungal cells, which can be from the same individual (self-fusion) or different individuals (cross-fusion). This fusion results in the formation of a dikaryotic cell, which contains two genetically distinct haploid nuclei in a single cytoplasm. Following plasmogamy, karyogamy occurs. Karyogamy is the fusion of the haploid nuclei within the dikaryotic cell, resulting in the formation of a diploid nucleus. This diploid nucleus then undergoes meiosis, which is a process of cell division that reduces the chromosome number and produces haploid spores.
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Fungi are mainly multicellular, non-photosynthetic organisms with chitinous cell walls that obtain nutrients by extracellular digestion and absorption. Coverage includes hyphae, mycelium, spores, yeast, moulds, mushrooms, decomposer and parasitic roles, and the differences between fungi, plants and bacteria.
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