Final answer:
Due to genetic drift, Fst is expected to increase over five generations in a small population with an effective size of 10, assuming no mutation, migration, or selection, and random mating. The specific rate of increase isn't provided, as it requires more detailed information about initial allele frequencies and a mathematical model for precise calculation.
Step-by-step explanation:
When considering the changes in Fst (genetic differentiation) over five generations in a population with an effective size of 10, we must refer to the principles of genetic drift. Genetic drift has a substantial impact in small populations, causing allele frequencies to fluctuate randomly over time. This effect is termed 'random walk' and can lead to the fixation of alleles. In the absence of mutation, migration, and selection, and assuming random mating, the genetic variation is influenced only by genetic drift.
Since the population size is small (10 individuals), genetic drift will likely cause significant changes in allele frequencies, which will be reflected in an increase in Fst. However, without specific information about the initial allele frequencies and without a formula or table to calculate the exact rate of change in Fst, we cannot provide one of the specific numerical answers listed as potential outcomes. Generally speaking, genetic drift is expected to cause Fst to increase over time in such small populations because it leads to greater genetic differentiation between subpopulations due to the random sampling of alleles.