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

在后期双着点将形成一个桥，无着点单形成一断片，此两者均可记录下来。

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

此时每条一对单构成，这两条联合的称为四分。

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型及单型畸变。