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Phylogeny of Sry Copies. Phylogeny of the six Sry copies found on the SHR/Akr Y chromosome. Brackets {} indicate the genotype at the 5 diagnostic differences indicated in Table 1: bp-71, bp442–480, bp466, bp474 and bp 550 (del = deletion, ins = insertion, + = no deletion or insertion), bolded differences are new divergent mutations. Copies in shaded boxes are ancestral/hypothetical copies.
