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1·The gene that stops the body cells of Volvox reproducing is called regA.

阻止团藻的体细胞生殖的基因叫regA。

2·What Dr Nedelcu and Dr Michod did was to look for an antecedent of regA in a single-celled creature, in order to find out what its job was.

Nedeclu博士和Michod博士在单细胞生物中寻找regA的antecedent，从而了解它的作用。

3·By searching for genetic sequences similar to regA in the burgeoning databases of genes that now exist, they found one in a unicellular alga called Chlamydomonas reinhardtii.

他们在现有的尚处于萌芽阶段的基因数据库中搜索与regA的基因序列相似的基因，并找到了一种属于单细胞藻类Chlamydomonas reinhardtii的基因。