when tb-tt chromosomes were prepared with the conventional air-drying method followed by the osmium tetroxide-thiocarbohydrazide ( oso4-tch ) technique and examined by scanning electron microscopy ( sem ) , the tb-chromatid appeared somewhat more slender and showed more conspicuous spiral structures , thereby appearing more loosened compared to the tt-chromatid .
C0008633
chromosomes
C0008545
chromatid