What is the most genetically complex organism?
Edit: I would define genetic complexity as either genome size or number of genes. Either answer or information would work.


Largest genome: Paris japonica, a rare plant. Its genome is 149,000,000,000 base pairs large. Approximately 50 times larger than the human genome, by base pair count.

Higher number of genes in an organism: Daphnia pulex, a very common species of water flea. 31,000 protein-coding genes.

As already pointed out, the most genetically complex organism is an unclear question. Complexity can be interpreted in different ways, and I don't think we could agree on a satisfying measure (or definition, for that matter) of genetic complexity.