Question

roy is an adult with xxy chromosomes. he was assigned the sex of male at birth, yet during puberty his voice never deepened, and he does not have chest or facial hair. he has breasts. given this information, regarding roys genetics and his sex characteristics. roy may have the dsd called_____.
a primary; klinefelter syndrome
b primary; congenital adrenal hyperplasia
c secondary; klinefelter syndrome
d secondary; turner syndrome

Explanation:

• Primary vs. Secondary Sex Characteristics:
• Primary sex characteristics are related to the reproductive system (e.g., testes, ovaries). Secondary sex characteristics are non - reproductive and develop during puberty (e.g., voice deepening, breast development, body hair). Roy's issues (voice not deepening, lack of chest/facial hair, breast development) are secondary sex characteristics.
• Klinefelter Syndrome:
• People with Klinefelter Syndrome have an extra X chromosome (XXY). It is associated with male - assigned individuals having underdeveloped secondary male sex characteristics (like lack of facial/chest hair, less voice deepening) and sometimes some female - like secondary characteristics (such as breast development).
• Congenital Adrenal Hyperplasia:
• This is related to problems with the adrenal glands and usually affects primary sex characteristics development in a different way (e.g., in females, there may be ambiguous genitalia at birth due to over - production of androgens).
• Turner Syndrome:
• Individuals with Turner Syndrome have a missing or partially missing X chromosome (XO). It mainly affects females, with characteristics like short stature, underdeveloped ovaries (primary sex characteristic issue), and no secondary sex characteristics development as in typical females.

Answer:

C. secondary; Klinefelter Syndrome