Final answer:
Fraternal and identical twins differ in their genetic makeup and how they are formed.
Step-by-step explanation:
Fraternal twins are formed when two separate eggs are fertilized by two different sperm cells, resulting in two genetically distinct individuals. They can be of different genders and generally share about 50% of their genetic material.
Identical twins, on the other hand, are formed when a single fertilized egg splits into two embryos. They have identical genetic material and are typically the same gender.
An example of fraternal twins is Mary-Kate and Ashley Olsen, while an example of identical twins is the famous duo, Tia and Tamera Mowry.
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