<prompt> F body isY chromatinX chromatinChromosome 1Chromosome 21  <response>: Ans. a Y chromatinRef: Emery GeneticsQuinacrine, a fluorescence dye, binds strongly to the Y chromosome forming a bright fluorescent spot F body. This is clearly visible in stained interphase cells from various tissues from the human male and in mature spermatozoa 