# Biology

Genetics, molecular biology and ecology rely on a handful of standard calculations. A Punnett square shows that crossing two Aa parents gives offspring in an expected 1:2:1 ratio of AA, Aa and aa. Other common ones are Hardy-Weinberg allele frequencies, DNA reverse complements, cell culture dilutions and population doubling time.

## Tools

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Category: [Science & Engineering Calculators](https://techolm.com/science-calculators)