Biology & Genetics Tools

Mendel counted 315 round yellow peas, 108 round green, 101 wrinkled yellow and 32 wrinkled green. That is close to the 9 : 3 : 3 : 1 a dihybrid Punnett square predicts. Punnett Square Calculator & Generator builds the square for any cross of up to four genes, colours each box by phenotype and reduces both ratios to lowest terms. Switch a gene to incomplete dominance and the blended heterozygote gets a row of its own.

Sequence tools come next: DNA to RNA transcription and translation, a codon table, GC content, and a reverse complement generator for primer design.