Biology study tools
Deterministic DNA/RNA calculators, Mendelian tools, and interactive explorers for chromatin and cell division. No account required.
Calculators
DNA → RNA Transcription
Transcribe a DNA sequence to RNA with strand-mode controls.
RNA → Protein Translation
Translate RNA with the standard genetic code and reading-frame options.
DNA → Protein
Run DNA through transcription then translation and show the intermediate RNA.
DNA Reverse Complement
Compute reverse, complement, and reverse-complement sequences.
GC Content Calculator
Count bases and compute GC% and AT/AU%.
Sequence Analyzer
Summarize type, composition, reverse complement, and reading frames.
Codon Lookup
Look up codons and amino acids in the standard genetic code.
Amino Acid Lookup
Verified standard amino-acid names, codes, classifications, and codons.
Punnett Square Calculator
Monohybrid Punnett squares with genotype and phenotype probabilities.
Dihybrid Punnett Square
Two-locus Mendelian Punnett squares assuming independent assortment.
Hardy–Weinberg Calculator
Solve p, q, p², 2pq, and q² for common missing-value scenarios.
DNA Base-Pair Calculator
Convert bp counts into educational length estimates with explicit assumptions.
Molecular Biology Unit Converter
Convert bp/kb/Mb/Gb and optional dsDNA mass estimates.
Interactive explorers
Interactive Codon Table
Click any of the 64 standard codons to inspect its amino acid.
Chromosome Terminology Explorer
Interactive definitions for chromosome, chromatid, homologs, centromere, telomere, and chromatin.
Cell Cycle Explorer
Interactive walkthrough of G1, S, G2, and M.
Mitosis Explorer
Interactive progression through mitotic stages.
Meiosis Explorer
Interactive overview of meiosis I and meiosis II.
DNA Packaging Explorer
Interactive hierarchy from DNA to nucleosome to chromatin to chromosome.
Nucleosome Explorer
Interactive explainer of nucleosome structure and histone tails.
DNA Packaging Scale
Step from double helix toward condensed mitotic chromosomes.