Final answer:
Monozygotic twins share 100% of their genes, being genetically identical since they originate from the same fertilized egg that splits. Dizygotic twins, or fraternal twins, are no more genetically identical than regular siblings, as they come from separate fertilized eggs.
Step-by-step explanation:
The individual who shares 100% of their genes would be b) Monozygotic twins. Monozygotic twins, also referred to as identical twins, develop from a single fertilized egg that splits into two, resulting in two individuals with identical genetic material. On the other hand, dizygotic twins or fraternal twins, come from two different eggs fertilized by two different sperm, making them no more genetically identical than siblings born at different times. Therefore, the genetic similarity among dizygotic twins is the same as that of regular siblings, not 100%.
Individual genetic maps in a given species can be genetically similar, but not identical, except for the case of monozygotic twins, who are genetically identical.