Question

codominance → both alleles are fully expressed
sex-linked traits are located on the x chromosome. males are more likely to express recessive sex-linked traits because they have only one x chromosome.
explain why recessive sex-linked traits are more common in males.
genetic disorders and mendelian genetics

Explanation:

Sex-linked recessive traits are carried on the X chromosome. Females have two X chromosomes ($XX$), so they can be carriers (having one recessive allele and one dominant allele) without expressing the trait. Males have only one X chromosome ($XY$) and no corresponding allele on the Y chromosome to mask the recessive allele. If a male inherits the X chromosome with the recessive allele, he will express the trait, as there is no dominant allele to counteract it.

Answer:

Recessive sex-linked traits are carried on the X chromosome. Males have only one X chromosome (and a Y chromosome with no corresponding allele for the trait), so if they inherit an X chromosome with the recessive allele, they will express the trait. In contrast, females have two X chromosomes, so they can inherit one recessive allele and one dominant allele (acting as carriers) without expressing the recessive trait, making the expression of the recessive trait far more common in males.