What are Alternation of generations in ferns and seed plants?

Answer:
Gen 1 = The plant reproduces sexually

Gen 2 = The offspring of that plant reproduce asexually

and the cycle begins again, hence the name alternation

---Caveat---

This is a very simple explanation and surely there are exceptions and important details to consider depending on the exact species. For instance, triggers that can cause an alternation of generations, or sequences *how many times a the plant reproduces sexually/asexually before switching. Plant reproduction can be very complex! Good question. Just remember, all true plants will have alternating generations.
First answer by Wood7932. Last edit by Wood7932. Contributor trust: 1 [recommend contributor recommended]. Question popularity: 1 [recommend question].