Genetic Kids Lab Guides — blood type charts, height formulas and classroom genetics myths

Parents’ blood type chart for children, explainedAll 10 combinations · A × B can give any type · hidden O genes
cis-AB blood type — the exception to the AB × O ruleA and B on one allele · about 0.035% of Koreans · retest first
How Rh-negative blood type is inheritedRh+ is dominant · hidden d allele · rare in East Asia
Dimples, earlobes, tongue rolling and double eyelids — dominant or myth?Textbook example ≠ proven single gene · weak evidence for dimples · tongue rolling retracted
Baby eye color genetics for brown-eyed and mixed-heritage familiesOCA2, HERC2 and more · brown-dominant is outdated · most East Asian eyes are dark brown
How to use the mid-parental height formulaBoys (dad + mom + 13 cm) ÷ 2 · girls (dad + mom − 13 cm) ÷ 2 · about ±8.5 cm
Left-handedness genetics — how parents’ handedness relates to a child’sAbout 10% left-handed · about 25% heritable · dozens of genes plus prenatal factors
Is baldness inherited from the mother’s side? X chromosome factsAR gene is on the X · only 40 of 287 signals on the X · dad’s side matters too
How to draw a Punnett square and avoid common homework mistakes2 × 2 grid · 3:1 only when both are carriers · blood type is a good example
Traits that skip a generation — carriers, grandparents and sibling differencesHidden recessive alleles · 3-generation pedigree · same parents, different kids

Genetic Kids Lab - Child Trait Simulator

Pick the parents’ traits and see trait ratios across 1,000 virtual children. An educational, just-for-fun simulator that works offline. Free on Android.

Get it on Google Play