Find your next connection.
From a genetic cross to a growing population: choose a tool and start exploring.
20 tools and collections
Punnett square calculator
Cross two parents for one trait, two traits, or ABO blood type and see genotype and phenotype ratios with steps.
DNA to mRNA converter
Turn a coding strand, template strand, or mRNA into codons, tRNA anticodons, and an amino-acid chain, with the genetic code table.
Codon chart & amino acid lookup
Look up any of the 64 mRNA codons, find every codon for an amino acid, and read the start and stop codons in the genetic code table.
Population growth calculator
Solve growth word problems, find doubling time and growth rate, and compare exponential and logistic curves.
Hardy-Weinberg calculator
Find allele and genotype frequencies from p, q, or observed counts, then test a population for equilibrium.
Cell size & surface-area-to-volume ratio
Enter a cell’s side length or radius to get its surface area, volume, and SA:V ratio with worked steps, and see why doubling the size halves the ratio.
Enzyme kinetics explorer (Michaelis–Menten)
Calculate reaction rate from Vmax, Km, and substrate concentration, then add a competitive or noncompetitive inhibitor and watch the saturation curve change.
Dilution calculator (C₁V₁ = C₂V₂)
Solve C₁V₁ = C₂V₂ for the stock volume or final concentration, get the diluent to add, and plan serial dilutions with the concentration after every step.
Magnification & scale bar calculator
Find actual size, image size, or magnification with correct mm-to-µm conversion, work out total microscope magnification, and size a scale bar.
Water potential & osmosis calculator
Calculate solute potential with Ψs = −iCRT and water potential Ψ = Ψs + Ψp in MPa or bars, then compare two cells to see which way water moves by osmosis.
Bacterial growth & doubling time
Find bacterial generation (doubling) time from two counts, or the cells after any time with N = N₀ × 2ⁿ, and see exponential growth on a log-scale curve.
Energy pyramid & the 10% rule
Enter the energy captured by producers and a transfer efficiency to see how much reaches each consumer level, how much is lost, and why food chains stay short.
Chi-square test for genetics
Test whether observed offspring counts fit a 3:1, 1:1, 1:2:1 or 9:3:3:1 Mendelian ratio: χ², degrees of freedom, critical value, p-value and verdict.
Predator–prey simulator (Lotka–Volterra)
Simulate prey and predator populations with the Lotka–Volterra equations: set the four rates, watch the boom-and-bust cycles, and find the equilibrium point.
Cell atlas
Compare organelles: where each is found, what it does, and how the parts of a cell work together.
3D cell model
Turn an animal or plant cell in 3D, pull it apart to see every organelle with its label, and tap one to learn its job.
Printable diagrams
Download or print cell diagrams to label and blank Punnett square grids, with optional answer keys.
Worksheet builder
Create a printable biology practice sheet with an optional answer key.
Practice studio
Take a short quiz, read explanations, and review your mistakes.
Concept notes
Learn the idea, work through an example, and avoid common mistakes.
No matching tools. Try a broader word or choose “All”.