How do scientists find their way around a chromosome? With chromosome maps called idiograms, researchers can pinpoint the locations of genes and locate abnormal gene forms. Aa Aa Aa Most ...

Discover how researchers identified an octopus' ancient sex chromosomes and why their genetic history is such a mystery.

The octopus just revealed another one of its secrets: what determines its sex. University of Oregon researchers have ...

Researchers have identified a sex chromosome in the California two-spot octopus. This chromosome has likely been around for 480 million years, since before octopuses split apart from the nautilus on ...

Humans possess two kinds of chromosomes, labeled X and Y. Typically, females have a pair of X chromosomes in every cell, ...

Not all that data was clearly labeled as being from male or female octopuses. But they found another example of the half-sized chromosome in another species of octopus. They also found it in squid ...

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 ...

Live imaging of embryos at different stages. Chromosomes are labeled in magenta. 4-cell sister blastomeres are shown, along with 3D-reconstructed images of 2-to-4-cell and 4-to-8-cell divisions.

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 ...

Each replicated chromosome is made up of two identical strands called chromatids that are joined together. Each chromatid is a full length DNA molecule. The stages outlined in the following ...