Which of the following statements about monozygotic twins is TRUE?
A) They are no more similar to one another than normal siblings.
B) They will always have identical temperaments.
C) They will always be born with identical physical characteristics.
D) One twin may be right-handed while the other is left-handed.

Question

Quizplus · Accepted Answer

Monozygotic twins are formed from a single fertilized egg that splits into two embryos. Therefore, they share the same DNA and are identical genetically. However, environmental factors can cause differences in their physical characteristics and behaviors, including handedness. Therefore, statement D is true. Statements A, B, and C are false. Monozygotic twins are more similar to one another than normal siblings and may have different temperaments and physical characteristics due to environmental factors.

Which of the Following Statements About Monozygotic Twins Is TRUE