Final answer:
The question's focus on transgender individuals highlights the distinction between sex and gender, indicating a social constructivist perspective on gender identity and sexuality.
Step-by-step explanation:
The existence of transgender individuals suggests a more complex relationship between biologically determined sex and socially constructed gender. Transgender people have a gender identity that is different from their sex assigned at birth, challenging the notion that gender is strictly biological. In contrast to biological determinism which links behavior to biology, sociological and anthropological research explores gender as a social construction and recognizes a diversity of gender expressions and identities globally. Moreover, sexuality, as queer theorists argue, may also be considered a social construct influenced by societal norms and expectations rather than being solely biologically driven.