You would expect a gamete from this organism to contain 29 chromosomes. Here's why:

* Diploid cells have two sets of chromosomes (one from each parent).

* Gametes (sperm and egg cells) are haploid, meaning they have only one set of chromosomes.

* Meiosis is the process that produces gametes. During meiosis, the number of chromosomes is halved.

Therefore, if a diploid cell has 58 chromosomes, a gamete from that organism would have 58/2 = 29 chromosomes.