Sometimes, early in the gestational process, a single fertilized egg divides and separates. Two individuals with exactly the same chromosomal composition begin to form. This results in ________ twins.

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Monozygotic twins result from the division and separation of a single fertilized egg, leading to two individuals with identical chromosomal composition. This is in contrast to fraternal or dizygotic twins, which result from the fertilization of two separate eggs by two separate sperm cells. Sibling is not a term used to describe twins.

Sometimes, Early in the Gestational Process, a Single Fertilized Egg