短語(yǔ)詞組短語(yǔ)single crossing -over 單一互換illegitimate crossing -over [遺]不正常交換crossing -over suppressor 交換抑制基因somatic crossing -over 體細(xì)胞交換interchromosomal crossing -over 染色體間的交換crossing g over value 交叉價(jià)crossing g over unit 交換單位 返回 crossing over