Haploid chromosomes and genital cells of Radopholus similis stained with DAPI Haploid chromosomes. A RsB population B RsL population C RsN population D RsY population; Genital cells E Female stained with DAPI F Male stained with DAPI G Female Non-stained with DAPI H Male non-stained with DAPI Arrows Arrow a: Cap cell; Arrow b: Somatic cells; Arrow c: Germinal zone; Arrow d: growth zone; Arrow e: spermatheca; Arrow f: testis; Arrow g: seminal vesicle.