Use Dihybrid Ratio when you need to report the classic 9:3:3:1 phenotypic fractions of an AaBb x AaBb dihybrid cross. Enter Cross type using the definitions and units below so the result can be reproduced.

Cross type

A sequence, category, or text value; accepted values are aabb-cross.

The published tool contract uses this rule: Report the classic 9:3:3:1 phenotypic fractions of an AaBb x AaBb dihybrid cross.^[1]

Both dominant traits

The calculated both dominant traits.

Exactly one dominant trait

The calculated exactly one dominant trait.

Both recessive traits

The calculated both recessive traits.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Cross type values and their units alongside the result. Monohybrid Punnett is useful when you instead need to compute offspring genotype probabilities for a monohybrid cross between two parents. N:C Ratio provides another view by helping you compute the nucleus-to-cytoplasm ratio from nuclear and cytoplasmic cross-sectional areas.

• Monohybrid Punnett

  Compute offspring genotype probabilities for a monohybrid cross between two parents.

• N:C Ratio

  Compute the nucleus-to-cytoplasm ratio from nuclear and cytoplasmic cross-sectional areas.

• 260/230 Ratio

  Calculate the A260/A230 purity ratio used to detect organic compounds and salts carried over from extraction.