Traits as diverse as the color of a person's eyes and the scent of a rose are determined by the information contained in DNA. Learn how this information is coded by strings of molecules called ...

When bacterial DNA is labeled with radioactive atoms, it takes its own picture. Autoradiographs reveal that the bacterial chromosome is a single very long DNA molecule and show how it is duplicated ...

Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while males have one X and one Y. However, there is some evidence that the Y ...

This was possible because unlike mature hepatocytes, the labeled cells had only two copies of each chromosome. By following the descendents of the stem cells for up to a year, the scientists ...

The appropriate volume of each labeled pool (to contain 100 ng of ... Before hybridization, metaphase chromosomes on slides were treated with 100 μg/ml RNase for 1 h at 37 °C and 30 μg/ml ...