Punnett Square Predictor
Predict offspring genotypes and phenotypes for genetic diseases
Parent 1 Genotype
AA (homozygous dominant)
Aa (heterozygous)
aa (homozygous recessive)
Parent 2 Genotype
AA (homozygous dominant)
Aa (heterozygous)
aa (homozygous recessive)
A
a
A
Aa
Aa
a
aa
aa
50% carriers (Aa), 50% affected (aa) — Autosomal recessive pattern
Cystic Fibrosis
Huntington's
PKU
Autosomal recessive: two copies needed. Autosomal dominant: one copy is sufficient.