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].
What the DNA replication team does is very much like that. While a zipper has only one kind of tooth, DNA has four; A, T, C, and G. Lucky for me, they know where they belong. The first thing the DNA replication team does is unwind (un-zip) a small section of the old chromosome and pull the two strands apart.