Can identical twins have the same DNA?

Study for the Evidence Technician Exam. Use flashcards and multiple choice questions with hints and explanations. Prepare effectively for your exam!

Identical twins, also known as monozygotic twins, originate from a single fertilized egg that splits into two embryos. As a result, they share the same genetic material and thus have nearly identical DNA. This genetic similarity is why identical twins often exhibit very similar physical traits and may have comparable health conditions.

It's important to highlight that while they have nearly identical DNA, some variations can occur due to environmental factors, mutations, or epigenetic changes as they develop and grow. However, these factors do not change the fundamental DNA they share. This genetic profile is a key reason why option B is accurate, as it reflects the unique biological relationship that exists between identical twins.

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