Extended Haplotype Homozygosity (2D): Selective Sweep Decay Maps

Population genomics infers recent natural selection not from allele frequency alone but from the shape of the chromosome around it. This simulator renders a bundle of sampled haplotypes as a 2D matrix around a core SNP and erodes each row generation by generation with a real recombination model, so you can watch a strongly selected allele carry an anomalously long, unbroken haplotype block compared with a neutral allele at the same frequency. Live EHH decay curves, an allele-frequency trajectory panel and an iHS score — the actual statistics genome scanners compute from 1000 Genomes and biobank haplotype panels — update as you change the selection coefficient, sweep age, recombination rate and sample size. Drag and scroll the haplotype map to pan and zoom, just like a genome browser.