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AP BIOLOGY
Cell Membrane Transport
Simulate four types of membrane transport: simple diffusion, facilitated diffusion, active transport (ATP-powered), and osmosis. Adjust inside/outside concentrations and watch particles move across an animated phospholipid bilayer. ATP pump and channel proteins are rendered for each mode.
AP BIOLOGY
Mendelian Genetics
Interactive Punnett square builder with four cross types: monohybrid (3:1), dihybrid (9:3:3:1), testcross (1:1), and incomplete dominance. Select parent genotypes via dropdowns to regenerate the square and ratio donut chart instantly. Simulate 100 offspring to compare empirical vs expected ratios. Color-coded cells distinguish dominant, heterozygous, and recessive genotypes.