Bio121

It shows how the DNA must curl together to form cromosomes before mitosis can be successful in producing a fully functional cell.

 http://www.ictscience.co.uk/page08.asp

To read more

 http://www.physorg.com/news82818712.html

Neanderthal have always been thought of as having become extinct due to competition with more modern humans. But recent studies have determined that neanderthal genomes are present in many modern humans indicating that they also integrated into the rest of the human society. This confirmed the reason behind there being certain groups of people with neanderthal features that could not easily reproduce with other groups of people, this has been an unconfirmed rumor for a couple of years.

For more information check out http://genealogy.about.com/cs/geneticgen…

DNA testing in general has become more and more popular, one of these tests can trace Y-chromosomes and their movement across regions this works well to some degree because it can only be traced back down only one chain but yet it can be matched up against near identical Y chromosomes to map the paths traveled. Mine was traced back through northern Europe down to the Middle East (Jordan and Lebanon) eventually. 

The Y chromosome was tested with a mouth swab. To trace it the chromosome was matched against chromosomes across the world.

Dust accumulated on a screen

Dust is an interesting substance because it can act very differently depending on what it is compose of. I could either be biological in nature or just simply small particles of dirt or pollution. Much of the dust that we come into contact with is made up of skin cells from our constant shedding. This is where dust mites come in, they are incredibly small spidery insects that eat these dead skin cells. The dust we are familiar with is a typical example of decomposition.