Tag Archives: chromosomes

“Can you define the word ‘woman’?”

Jayant Radhakrishnan Darien, Illinois, United States   Venus is considered to be the epitome of feminine beauty in the western world. Does it matter that she has no arms? Venus de Milo. Louvre Museum. Photo by Tupungato on Dreamstime. “The more you know the more you realize you don’t know.” — Aristotle (384 BCE-322 BCE) […]

Mitochondrial DNA: a maternal gift

Marshall Lichtman Rochester, New York, United States   Human haplogroup tree rooted at Mitochondrial Eve. By Wapondaponda. 2009. Via Wikimedia. CC BY-SA 3.0 DNA is arrayed on twenty-three pairs of chromosomes in human cell nuclei. It is coiled tightly around proteins called histones that together with DNA form a chromosome. The largest chromosome carries several […]

The first description of DNA: a six million dollar letter from Francis to Michael Crick

Marshall A. Lichtman  Rochester, New York, United States   Figure 1. The boyish appearing James Watson (left) and the Francis Crick with their three-dimensional model of DNA in their Cavendish Laboratory office at Cambridge University, United Kingdom. Circa 1953. Photo credit: A. Barrington Brown/Science Photo Library. Via the Rockefeller University Digital Commons. In the April […]