When a pedigree is constructed, autosomal dominant disorders typically appear only in males appear only in females appear in every generation seem to disappear in one generation, only to reappear in the next generation?

I believe the answer is that they appear in every generation.
Autosomal dominant is a pattern of inheritance in which an affected individual has one copy of a mutant gene and one normal gene on a pair of autosomal chromosomes. Thus in an autosomal dominant disease, if you inherit the abnormal gene fro one parent, you can get the disease. 

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

You grow to. e jansnnsns