gen-briefly-explain-sex-linked-inheritance-and-one-common-miscon-5835

Briefly explain sex-linked inheritance and one common misconception about it.

## Sex-Linked Inheritance Sex-linked inheritance refers to genes located on sex chromosomes (X or Y), most commonly the X chromosome. Because males have only one X chromosome (XY) while females have two (XX), males express X-linked recessive traits more frequently—they need only one copy of the recessive allele, while females need two. **Classic examples:** Color blindness, hemophilia, and Duchenne muscular dystrophy ## Common Misconception **"Only males can have X-linked disorders"** This is false. While males are much more likely to be *affected* by X-linked recessive conditions, females can also have these disorders if they inherit the recessive allele from both parents. Females who inherit one copy are typically carriers and usually unaffected due to their second, normal X chromosome, though some may show mild symptoms due to X-inactivation (lyonization). For example, a color-blind father and a carrier mother can have a color-blind daughter—it's just statistically less common than affected sons.