chromatid

1.At anaphase the dicentric chromatid will form a bridge and the acentric a fragment, both of which can be scored.

在后期点染色体将形成一个桥，无点染色体单体形成一断片，此可记录下来。

2.At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.

此时每条染色体由一对染色单体构成，这条联合的染色体称为四分体。

3.Human Peripheral blood exposed with tritiated water at variousdoses for 54 hr was examined to observe the chromosome and chromatid abe-rrations at metaphases in the first mitosis of lymphocytes.

将人体外周血在不同剂量的氚水中培养54小时,观察到淋巴细胞第一次有丝分裂中期的染色体型及单体型畸变。