A: A blood moon is a deep reddening of the moon caused by the Earth passing between the moon and the sun. During the period of the eclipse, light from the sun... Full Answer >
Sometimes, bones are the only accessible source of DNA, thanks to their structure, which preserves DNA comparatively well and for a long time. The main problems of DNA extraction from bones are DNA degradation due to environmental factors and the presence of soil-derived inhibitors like humus acids [1â10].
When she is ready to extract DNA, she cuts a small piece of bone or tooth and crushes it into powder. It looks a little like flour you can bake with. In the bone powder are millions of bone cells and millions of cells from other organisms, including bacteria and parasites. A copy of the DNA is located inside every single cell. Next, she needs to crack open the cell walls so that the DNA spills out. A special enzyme does this job.