Which term defines a sex-linked recessive disorder?

The term that defines a sex-linked recessive disorder is hemophilia. This condition specifically affects the blood's ability to clot, leading to excessive bleeding. It is caused by mutations in genes located on the X chromosome, making it more likely to occur in males who have only one X chromosome. Females, having two X chromosomes, are typically carriers but may not exhibit symptoms unless they inherit the mutated gene from both parents, which is less common.

In contrast, hemoptysis refers to the coughing up of blood and is not a genetic disorder but rather a symptom of various underlying conditions. Adenoma is a benign tumor formed from glandular tissue, which is unrelated to sex-linked genetic disorders. Acromion pertains to a bony process on the scapula, which is specific to anatomy and does not relate to genetic conditions at all. Thus, hemophilia is the only term that accurately fits the definition of a sex-linked recessive disorder.