Sex-linked disorders are more common in males because males have only one X chromosome, while females have two. This means that if a male inherits a defective gene on the X chromosome, he will have the disorder because he does not have a second X chromosome to compensate for it. In contrast, females would need to inherit two defective genes on both X chromosomes to have the disorder. This is why sex-linked disorders, which are caused by genes on the X chromosome, are more common in males.
