Why are sex linked recessive characters more common in the male human beings?

Explanation

(i) Male human beings are hemizygous. Their sex chromosomes consist of one X and one Y chromosomes.
(ii) Sex linked character are inherited through genes in sex chromosomes since males inherit one allele only for sex linked character (one X and Y chromosomes) they express the trait commonly.
(iii) In female there are two x chromosome representing the sex chromosomes for each sex linked character. Therefore expression of the character depends on both the alleles. Sex linked inherited traits are more common in males than females because, males are hemizygous and therefore express the trait when they inherit one mutant allele.