Final answer:
Girls exposed to masculinizing hormones prenatally often exhibit tomboyish behaviors as they grow, reflecting a biological influence on gender expression. Being tomboyish does not necessarily define sexual orientation or identity, and gender expression is influenced by multiple factors.
Step-by-step explanation:
The girls who were exposed to masculinizing hormones prenatally often display behaviors that are less traditionally feminine and might be described as tomboyish as adolescents and young adults. This reflects biological influences on behavior, which can include preferences for activities that are typically associated with the opposite sex, such as physical aggression or rough-and-tumble play. It's important to note that this exposure does not determine sexual orientation or gender identity; it can influence a range of behaviors that are associated with masculinity or femininity.
When individuals do not conform to their society's normative gender roles, they may confront negative social reactions. Boys and girls may be subject to ridicule or marginalization for nonconformity, potentially impacting their social interactions and development of self. Moreover, it's critical to understand that gender expression varies greatly and is influenced by a complex interplay of biological, environmental, and social factors.