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Based on experiments of sex reversal in hemp, it absolutely was 1st claimed by K. Hirata in 1924 that an XY intercourse-resolve program is present.[26] At the time, the XY method was the only real recognized program of intercourse perseverance. The X:A technique was initial explained in Drosophila spp in 1925.¿Qué es la salud psychological? Cómo