Final answer:
The expected ploidy of a cyst after encystation is 2n, or twice the haploid number of chromosomes.
Step-by-step explanation:
The expected ploidy of a cyst that has completed encystation is 2n, or twice the haploid number of chromosomes. Encystation is the process by which an organism forms a cyst or protective capsule around itself. During this process, the organism undergoes meiosis, which reduces the chromosome number to half. Therefore, the cyst will have a ploidy level that is double the haploid number of chromosomes.