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X-Linked Recessive Inheritance Simulator

Pick parental genotypes and watch a live 3D family tree show why X-linked recessive conditions hit males far more often, why an affected father never passes the condition to his sons, and how carrier mothers pass a 50/50 risk to every child.

Medicine & Biophysics3DModerate60 FPS

Explore why X-linked recessive conditions produce such a lopsided inheritance pattern. Because males carry only one X chromosome, a single copy of a disease allele is enough to affect them; females carry two, so they need the allele on both copies and can otherwise be silent carriers. Choose a genotype for each parent and watch the 3D family tree lay out all four equally-likely child outcomes — split by sex — with a live probability breakdown, including the rule that an affected father can never pass the condition to a son.

⚙ Under the hood

Pick parental genotypes and watch a live 3D family tree lay out every possible child outcome by sex, showing why X-linked recessive conditions hit males far more often and why an affected father can never pass the condition to a son.

geneticsX-linked inheritancemedical geneticsPunnett squarecarrierchromosomessex-linked traits

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install