Which of the following statements is/are true regarding Hardy-Weinberg equilibrium?

1. It describes how allele frequencies remain constant over generations under ideal conditions.
2. It involves factors like gene flow and genetic drift which always stabilize the gene pool.
3. Allele frequencies will remain unchanged unless acted upon by evolutionary forces.
4. Genetic recombination during gametogenesis is a key factor in disturbing Hardy-Weinberg equilibrium.