Polyploidy is the condition in which an organism has extra sets of chromosomes. It can be defined as a chromosomal alteration in which the organism posses more than two complete chromosome sets. Classified as an accident in cell division. Polyploidy is the condition in which an organism has extra sets of chromosomes.
Dubuque [1], founded in 1833, is the oldest city in Iowa. A port on the upper Mississippi River, it is situated along scenic bluffs facing the river, and has its roots in a mining and trading settlement established in the area by Quebec-born entrepreneur Julien Dubuque in 1788.
Several cities listed here, which are over 5000 years old, popularly claim to be the oldest city in the world. 1  Argos, Greece (6thâ5th millennium BC) 2  Athens, Greece (5thâ4th millennium BC) 3  Byblos, Lebanon (3000 BC)  Damascus, Syria (3rd millennium 1  BC) Luxor, Egypt (3200 2  BC) Jericho, West Bank (3000 BC or earlier)  Beirut, Lebanon (3000 BC)