There are three types of blood cells in the human body, but only one type of red blood cell. Red cells, or erythrocytes, are relatively large microscopic cells without nuclei â¦ .In this latter trait, they are similar to the primitive prokaryotic cells of bacteria.here are three types of blood cells in the human body, but only one type of red blood cell. Red cells, or erythrocytes, are relatively large microscopic cells without nuclei â¦ .
These four scientistsâWatson, Crick, Franklin, and Wilkinsâcodiscovered the double-helix structure of DNA, which formed the basis for modern biotechnology. Home / Learn / Historical Biographies At Kingâs College London, Rosalind Franklin obtained images of DNA using X-ray crystallography, an idea first broached by Maurice Wilkins. Franklinâs images allowed James Watson and Francis Crick to create their famous two-strand, or double-helix, model. In 1962 Watson (b. 1928), Crick (1916â2004), and Wilkins (1916â2004) jointly received the Nobel Prize in Physiology or Medicine for their 1953 determination of the structure of deoxyribonucleic acid (DNA).
1 The double helix structure of DNA was discovered by Dr. James Watson and Francis Crick in 1953. 2  If you unraveled all the DNA molecules in your body and placed them end to end, it would stretch to the Sun and back several times. 3  DNA is organized into structures called chromosomes within the cell.