Biology Tools and Calculators

BioExplorer hosts a growing set of interactive biology tools and calculators for the main branches of biology. Every tool pairs a browser-based calculator with a full explanation article that walks through worked examples from standard textbooks. Each calculator runs in your browser with no installation, no signup, and no data collection. New branches and tools are added as they ship.

Biology Tools Guide:

• Biology Tools
• Genetics and Inheritance Tools
• Coming Soon
• How to Use This Hub
• Why Browser-Based Tools?
• About the Tools
• Related Resources
• Frequently Asked Questions

Biology Tools

Genetics and Inheritance Tools

The first branch to ship is genetics, with free interactive calculators covering the main problem types students encounter in Mendelian and population genetics: building a Punnett square for a single cross, testing whether observed offspring match a hypothesis, working out inheritance when one gene modifies another, and predicting how allele frequencies behave in a population at equilibrium.

• Punnett Square Calculator: The classic monohybrid and dihybrid cross generator. Pick two parental genotypes, get the offspring ratio (3 to 1, 9 to 3 to 3 to 1) plus a full probability table. The original BioExplorer tool, used by thousands of students each year for homework help.
• Pedigree Analyzer: Type in a family history and the tool identifies which inheritance pattern fits: autosomal dominant, autosomal recessive, or X-linked recessive. Returns probability tables for each offspring genotype given the family tree.
• X-Linked Punnett Square Calculator: For sex-linked inheritance. Includes hemophilia A and B, color blindness, and Duchenne muscular dystrophy presets. Handles X-linked dominant and X-linked recessive crosses with full sex chromosome tracking (X^A X^a, X^A Y, X^a Y).
• Epistasis Calculator: For dihybrid crosses where one gene masks or modifies another. Returns the 4 by 4 Punnett square plus the modified Mendelian ratio: 9 to 3 to 4, 12 to 3 to 1, 9 to 7, or 15 to 1. Real disease examples for Labrador coat color, summer squash, sweet pea, and wheat seed color.
• Chi-Square Test Calculator: The standard statistics tool for genetics. Tests whether observed offspring counts deviate from a predicted Mendelian ratio. Returns chi-square value, degrees of freedom, p-value range, critical values at the 0.05 and 0.01 levels, and a plain language interpretation.
• Hardy-Weinberg Calculator: The population genetics workhorse for allele and genotype frequencies. Calculate p squared + 2pq + q squared from an allele frequency, or derive allele frequencies from observed genotype counts. Includes presets for PKU, cystic fibrosis, and sickle cell trait.

See the dedicated Genetics tools sub-page for a deeper look at how to choose between these and which to use for each problem type.

Coming Soon

BioExplorer is building out new biology tools across the major branches of biology. The categories below are in the active development pipeline. Each will get its own sub-page under /biology-tools/ when the first tools ship.

• Molecular Biology Tools: DNA to protein translation, reverse complement, molecular weight calculator, codon usage table. These are the workhorse calculators for molecular biology classes and lab work.
• Biochemistry Tools: Enzyme kinetics (Michaelis-Menten, Lineweaver-Burk), dilution calculator (C1V1 = C2V2), molarity, pH and Henderson-Hasselbalch buffer, protein concentration by A280.
• Microbiology Tools: Bacterial generation time, colony forming unit calculator, log reduction, spectrophotometry calculations, antibiotic MIC interpretation.
• Ecology and Population Biology Tools: Population growth (exponential, logistic), Shannon-Wiener and Simpson diversity indices, mark recapture population size, species area curve, allometric scaling.
• Cell Biology Tools: Cell cycle stage identification, hemocytometer counting, cell dilution series, doubling time for cell cultures.
• Evolution and Phylogenetics Tools: Hardy-Weinberg extensions to multiple alleles (ABO blood type calculator), F-statistics, codon evolution calculators, phylogenetic distance.

If you have a tool request, want a new preset or worked example added to an existing tool, or want to suggest a category, the BioExplorer team reads every email.

How to Use This Hub

1. Browse by category. Each section on this page groups tools by branch of biology. Pick the branch that matches your course or research question.
2. Click into the category sub-page for in-depth coverage. The genetics sub-page, for example, has a decision tree for choosing between six calculators and includes educational content on inheritance patterns. New sub-pages will follow the same pattern as each branch ships its first tools.
3. Click into the specific tool to read the explanation article and use the calculator. Each tool page has worked examples, FAQ, and a primary “How to Use the X Calculator” section.
4. No accounts, no downloads. Every tool runs in your browser. No login. No email capture. No app store. Open the page, do the problem, close the tab.
5. Mobile friendly. Each tool resizes for tablet and phone screens. Use them in lab, in class, or wherever you need to work a problem.

Why Browser-Based Tools?

Most online biology calculators are 1990s era university pages with broken layout, dead links, or janky Java applets. Native lab software requires installation and licenses. Closed source apps collect your data. BioExplorer takes a different approach: every tool is a single page on a public URL, runs in any modern browser, embeds the math directly, and cites real worked examples from standard biology textbooks in each branch.

The benefit for students is immediate: copy a homework problem into the tool, get the answer, understand the steps. The benefit for educators is repeatability: every tool gives the same answer every time, with the math shown so students can verify, not just trust.

Related Resources

• Branches of biology: Background on the major branches of biology (anatomy, biochemistry, botany, cell biology, ecology, evolution, genetics, microbiology, molecular biology, zoology) with the key concepts and thinkers in each.
• Biology glossary: Definitions for thousands of biology terms across every branch, with cross-references to the tools.
• History of biology: Timeline of major discoveries in biology, from ancient times through modern molecular biology, organized by branch.
• Why biology matters: An overview of biology as a scientific discipline, the methods it uses, and why it is fundamental to medicine, agriculture, and environmental science.
• Top Biology Discoveries. A curated list of the most important discoveries in biology, from cell theory and evolution through DNA structure and CRISPR gene editing.
• Fathers of Biology. Profiles of the scientists who shaped biology, from Aristotle and Darwin to Mendel, Pasteur, Watson, and Crick, with their key contributions and discoveries.
• Types of Flowers. Browse 500+ flower types organized by family, color, and habitat, with photos and identification guides for hundreds of species.
• Types of Animals. Browse the full animal kingdom organized by phylum and class, with species profiles, habitat info, and evolutionary relationships.
• Types of Birds. Browse all bird species by 40 different bird orders and family, with identification guides, range maps, and behavior notes.
• Types of Mammals. Browse mammal species by order (primates, carnivores, cetaceans, and others) with habitat, diet, and conservation status.
• Types of Reptiles. Browse reptile species by order (squamates, testudines, crocodilians) with identification photos and habitat information.
• Biology apps and tools: A broader directory of biology software and applications, including desktop and mobile tools beyond what BioExplorer ships in the browser.

Frequently Asked Questions