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Gene mutation on the X chromosome is most common and also explains why (depending on nationality) some 7% of males, but less than 1% of females exhibit color blindness of some form. Males only have one X chromosome, whereas females have two.
- X-linked recessive disorder-males are hemi-zygous for the gene red/green color blindness - 8% of the male population is red/green color blind-homozygous, color blind females (1:150) exist but are much raren than color blind males.emophilia A. - X-linked recessive disorder-inherited deficiency of clotting factor VIII-increased tendency to bleed on minor trauma-most severe mutations involve inversion of the an intron sequence-many different versions: allelic heterogeneity. î î î.