Work out punnett square instantly with clear inputs, formula shown and shareable results.
Builds the two-by-two Punnett square for a monohybrid cross and reports genotype and phenotype expectations.
Monohybrid cross
Each parent contributes one allele per gamete; Aa x Aa gives 1 AA : 2 Aa : 1 aa, a 3:1 phenotype ratio
They are expectations. Small families deviate widely because fertilisation is a random sampling process.
Then the heterozygote has its own intermediate phenotype and the ratio becomes 1:2:1 by phenotype as well.