染色单体

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

此时每条染色由一对染色构成，这两条联合的染色称为四分。

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

在后期双染色将形成一个桥，无染色形成一断片，此两者均可记录下来。

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型及型畸变。