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.
In the nucleus, the DNA double helix is packaged by special proteins (histones) to form a complex called chromatin. The chromatin undergoes further condensation to form the chromosome. So while the chromatin is a lower order of DNA organization, chromosomes are the higher order of DNA organization.An organismâs genetic content is counted in terms of the chromosome pairs present. e.g. humans have 23 pairs of chromosomes.he chromatin undergoes further condensation to form the chromosome. A compact structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes. Structure. Composed of nucleosomes-a complex of DNA and proteins (called histones).