[Campbell Biology P.707] Based on Figure 31.5, which sequence correctly represents the ploid... | Practice Question

Based on Figure 31.5, which sequence correctly represents the ploidy changes and key events during the sexual reproduction phase in fungi, starting from the fusion of cytoplasm?

  • A: Plasmogamy (fusion of cytoplasm) → Diploid (2n) zygote → Meiosis → Haploid (n) spores.
  • B: Plasmogamy (fusion of cytoplasm) → Heterokaryotic stage → Karyogamy (fusion of nuclei) → Diploid (2n) zygote → Meiosis.
  • C: Asexual Reproduction → Mycelium → Spore-producing structures → Haploid (n) spores.
  • D: Karyogamy (fusion of nuclei) → Heterokaryotic stage → Plasmogamy (fusion of cytoplasm) → Diploid (2n) zygote.

Explanation

Figure 31.5 illustrates the sexual reproduction pathway beginning with plasmogamy fusion of cytoplasm , leading to the heterokaryotic stage. This is followed by karyogamy fusion of nuclei which forms the diploid 2n zygote. The zygote then undergoes meiosis to produce haploid spores.