Enumerate three most characteristic criteria for designating a Mendelian population.

Explanation

To designate a Mendelian population, three characteristic criteria must be considered:

1. **Large Population Size**: The population must be sufficiently large to ensure that random genetic drift does not significantly affect allele frequencies. A larger population size helps maintain genetic diversity and minimizes the impact of chance events on the genetic makeup of the population.

2. **Free Flow of Genetic Material through Sexual Reproduction**: The genetic material within the population should be able to flow freely through sexual reproduction. This means that individuals within the population must be able to mate with one another without restrictions, allowing for the mixing of alleles and promoting genetic variation.

3. **Nil Migration**: There should be no migration into or out of the population. This means that individuals from outside populations should not enter the population being studied, and individuals from the population should not leave. Migration can introduce new alleles and disrupt the genetic structure of the population, which is not desirable when studying a Mendelian population.