The influence of aminopterin (AP), tritiated thymidine ([3H] TdR) and "cold" thymidine (TdR) on production of chromosomal aberrations in meristematic cells of Crepis capillaris irradiated in different stages of the mitotic cycle with 300 rad of 63Co gamma-rays was studied. All the chemical
The chromosomes of Crepis capillaris were labelled with thymidine-2-C(14) in their DNA fraction. Quantitative analysis of the distribution of newly synthesized DNA in postmetaphase stages of the division following the period of label incorporation led to the conclusion that the new DNA is not
Seedlings of Crepis capillaris were irradiated after pulse-labelling with tritiated thymidine ([3-H]TdR), and both chromosomal aberrations and presence of silver grains were recorded in the same metaphase cells at various intervals throughout the whole mitotic cycle. The following results were
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