Arrange the following key events in the conjugation process of *Paramecium* in the correct chronological sequence from start to finish.
- 1Two compatible paramecia align and attach to each other at their oral grooves.
- 2The diploid micronucleus in each cell undergoes meiotic division to produce four haploid micronuclei.
- 3The paired cells exchange one haploid migratory pronucleus across the cytoplasmic bridge.
- 4The stationary and migratory pronuclei fuse to form a diploid zygote nucleus (synkaryon).
Cevap
The correct sequence begins with the pairing of two cells at their oral grooves, followed by meiotic reduction of the micronucleus, reciprocal exchange of migratory pronuclei across the cytoplasmic bridge, and finally nuclear fusion (syngamy) to form a diploid synkaryon.
Conjugation in *Paramecium* follows a precise sequence: pairing at the oral groove region allows contact, followed by meiotic reduction of the diploid micronucleus to produce haploid pronuclei. Next, one migratory pronucleus is exchanged between cells, which finally fuses with the resident stationary pronucleus to restore diploidy.
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Sexual reproduction by conjugation in Paramecium
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