DNA is extracted from human cells for a variety of reasons. With a pure sample of DNA you can test a newborn for a genetic disease, analyze forensic evidence, or study a gene involved in cancer. Try this virtual laboratory to perform a cheek swab and extract DNA from human cells.
Your body produces billions of new cells every day. Each time one of your cells divides, it must first copy the genetic information contained within its nucleus. Copying the genetic information in one cell using this activity would take more than 95 years*, yet molecular machines in your cells accomplish this feat in about 6 to 8 hours.click here for learning how you can create a DNA MOLECULE .
The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny.Visit this page and see how small is CELL SIZE AND SCALE .Click here .
DNA is made of four simple building blocks, yet it contains all of the information necessary to build an organism. Segments of DNA called genes contain specific instructions that make each individual unique.Cellular machinery uses genes as instructions to assemble proteins.click here to See how cells "read" the information in a DNA sequence to build a protein, then build one yourself!
Reveals the connections between genetics and specific diseases ,Understand the science and the ethics behind genetics ,Want to know more about genetics? This non-intimidating guide gets you up to speed on all the fundamentals. From dominant and recessive inherited traits to the DNA double-helix, you get clear explanations in easy-to-understand terms. Plus, you'll see how people are applying genetic science to fight disease, develop new products, solve crimes . . . and even clone cats.Discover:* What geneticists do,* How traits are passed on,* How genetic counseling works,* The basics of cloning,* The role of DNA in forensics,* The scoop on the Human Genome Project .download link @ below