Chromosome-specific recombination rate. Comparison of the number of recombinations for women older than 30 (red) against those of age less than or equal to 30 (blue) at childbirth. Rates are shown for each of the chromosomes, including standard error. 328 children from the Mongol and Korean pedigrees are included in this dataset. Chromosomes 12 (p = 0.04) and 17 (p = 0.02) are significant if considered in isolation, but not after Bonferroni correction.