Our guide picked us up and entertained us the whole way, taking us to the best spots â we even had a close encounter with a bear on the side of the road! This wildlife photo tour will explore the wildlife, geology, and natural history of Grand Teton National Park.
Chromosomes contain smaller units of genetic material called DNA. DNA is a sequence of letters that spell out the genetic code. The DNA is organized into words and sentences called genes. Humans have approximately 20,000 genes and each one influences a part of development. These genes usually come in pairs.
The coils of DNA in the nucleus are called chromosomes. Chromosomes are very long stretches of DNA that are neatly packed together by proteins. The combination of DNA and the proteins that package DNA is called chromatin. The finger-like chromosomes are the most densely packed state of DNA.