Describe a genetic cross and get a clean, labeled Punnett square in seconds, with the allele combinations filled in and the genotype and phenotype ratios worked out. Monohybrid, dihybrid, sex-linked, and more.
Browse Punnett squares made with Figviz, or generate your own above
A 2x2 monohybrid cross with the classic 3:1 dominant-to-recessive ratio labeled.
A 4x4 dihybrid cross with the classic 9:3:3:1 phenotype ratio.
Multiple-allele ABO blood type cross showing possible offspring blood types.
An X-linked trait cross (e.g. colorblindness) showing carrier and affected offspring.
Incomplete dominance (red x white = pink) with the 1:2:1 phenotype ratio.
A test cross (Aa x aa) used to determine an unknown genotype.
Use these genetics scenarios as a starting point, then replace the alleles and trait details for your class.
A clear 2x2 square with the common genotype and phenotype ratios.
Create a labeled 2x2 Punnett square for pea plant height: T is tall and dominant, t is short and recessive. Cross two heterozygous plants, Tt x Tt. Put parent gametes along the top and left, fill every offspring genotype, and show the 1 TT : 2 Tt : 1 tt genotype ratio and 3 tall : 1 short phenotype ratio. Classic textbook style, white background.
A 4x4 cross that makes the 9:3:3:1 outcome explicit.
Create a labeled 4x4 dihybrid Punnett square for AaBb x AaBb, where A is yellow seed color over a green and B is round seed shape over b wrinkled. List AB, Ab, aB, and ab gametes on both axes, fill all 16 cells, and label the 9:3:3:1 phenotype ratio. Use readable text and a white background.
A sex-linked example that distinguishes carriers from affected offspring.
Create a labeled Punnett square for X-linked recessive hemophilia. Cross a carrier mother, XH Xh, with an unaffected father, XH Y. Fill the four offspring outcomes and label each as unaffected daughter, carrier daughter, unaffected son, or affected son. Include the genotype and phenotype percentages. Clear biology textbook style, white background.
A Punnett square is a grid that predicts the possible genotypes of offspring from a genetic cross. The alleles each parent can pass on are written along the top and side, and each cell shows one possible combination, which lets you read off the genotype and phenotype ratios. Figviz builds the grid and fills in the combinations from a plain description of the cross, so you do not have to draw and label cells by hand.
State the genotypes clearly and use a capital letter for the dominant allele and the matching lowercase for the recessive. For dihybrid crosses, list the gametes (AB, Ab, aB, ab) so the 4x4 grid fills correctly. Always sanity-check the ratios against what you expect (3:1 for a monohybrid Aa x Aa, 9:3:3:1 for a dihybrid) and regenerate if a cell looks off.
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