X-linked recessive inheritance involves the presence of a mutant gene. It leads to the expression of phenotype in males with the hemizygous condition (since males possess only one chromosome). In females, the expression of the phenotype occurs in homozygous individuals. Some of the genes present on the X chromosome resemble the genes on the autosomes. Examples include genes for color perception. The recessive traits express themselves only in a homozygous condition. A heterozygous female, though normal in the phenotype, becomes a carrier. She passes on the genes from the next generation. X-linked recessive inheritance dominates in males and affects less number of females. Mainly the unaffected carrier females pass on the traits to their sons. The affected male passes on the trait to all the daughters who will become carriers in future. The affected male does not transmit the trait to the sons since the affected genes are not present on the Y chromosome. Examples include DMD and hemophilia.