A. Micronucleus disintegrates
B. Each ex-conjugant divides only once
C. Macro nucleus undergoes division
D. Each micronucleus divides twice
Correct Answer:
Option D – Each micronucleus divides twice
Explanation
In Paramecium, Conjugation is a form of sexual reproduction. It is a temporary union of two individuals of same species for mutual exchange of genetic materials.
Through a process called conjugation, two paramecia line up side by side and then fuse together.
The two paramecium separate and go on their way in their watery environment.
They begin again to produce multiple copies of themselves through asexual fission.
During sexual reproduction, the micronuclei of each paramecium undergo meiosis, ultimately halving the genetic content to create a haploid nucleus.
These are exchanged between the two connected mates.
The haploid nuclei from each mate fuse to create a new, genetically varied, micronucleus.
