Final answer:
Dizygotic twins who think they are monozygotic twins may exhibit more similarities in behavior and personality, influenced by their belief in being identical. This is supported by studies like the Minnesota Study of Twins Reared Apart, which illustrate the strong similarity in personalities between identical twins raised together or apart.
Step-by-step explanation:
If dizygotic twins think they are monozygotic twins, it is suggested that they might be more like their siblings due to the belief that they are identical. This belief might influence their perception and behavior, making them exhibit similarities in their personalities. According to the findings of the Minnesota Study of Twins Reared Apart, identical twins, whether raised together or apart, have very similar personalities. This study enhances our understanding of the heritability of certain personality traits. The study also underscores that while genetics play a significant role in shaping our personalities, the expression of these genetic traits is influenced by a combination of many genes and epigenetic factors.