Frederick Griffith
In 1928 a scientist named Frederick Griffith was working on a project that enabled others to point out that DNA was the molecule of inheritance. Griffith's experiment involved mice and types of pneumonia, a virulent and a non-virulent kind. They injected the virulent pneumonia in to a mouse and the mouse died. Next they injected the non-virulent pneumonia in to a mouse and the mouse continued to live. After this, they heated up the virulent disease to kill it and then injected it in to a mouse. The mouse lived on. Last they injected non-virulent pneumonia and virulent pneumonia, that had been heated and killed, in to a mouse. This mouse died.
Why? Griffith thought that the killed virulent bacteria had passed on a characteristic to the non-virulent to make it virulent. They thought that this characteristic was in the inheritance molecule. This passing on of the inheritance molecule was what they called transformation.
In 1928 a scientist named Frederick Griffith was working on a project that enabled others to point out that DNA was the molecule of inheritance. Griffith's experiment involved mice and types of pneumonia, a virulent and a non-virulent kind. They injected the virulent pneumonia in to a mouse and the mouse died. Next they injected the non-virulent pneumonia in to a mouse and the mouse continued to live. After this, they heated up the virulent disease to kill it and then injected it in to a mouse. The mouse lived on. Last they injected non-virulent pneumonia and virulent pneumonia, that had been heated and killed, in to a mouse. This mouse died.
Why? Griffith thought that the killed virulent bacteria had passed on a characteristic to the non-virulent to make it virulent. They thought that this characteristic was in the inheritance molecule. This passing on of the inheritance molecule was what they called transformation.
No comments:
Post a Comment