What term describes multiple identical individuals arising from the same egg?

The correct term for multiple identical individuals arising from the same egg is "polyembrony." This phenomenon occurs when a single fertilized egg divides and develops into more than one individual, resulting in genetically identical organisms, known as clones. Polyembrony is relatively rare and is observed in certain species of plants and animals, specifically in some types of invertebrates and reptiles.

In contrast, the other options do not accurately describe this biological process. The term "monoembrony" implies the production of a single embryo from one egg, which does not relate to multiple identical individuals. "Multiegg" suggests multiple eggs rather than multiple individuals from a single egg, which also does not fit the definition in question. Thus, polyembrony is the precise term that encompasses the concept of multiple identical individuals arising from the same fertilized egg.