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Thomas Hunt Morgan found that genes are carried on chromosomes and are the mechanical basis of heredity.
Thomas Hunt Morgan and his students at Columbia University,they did a experiment about fly/s eye color. They discovrved that white-eyed is a sex-linked recessive trait. The gene for eye color must be physically located on the X chromosome. -
Frederick Griffith did experienment discovered what he called a transforming principle
Frederick Griffith, a scientist, was working on a project in 1928 that formed the basis that DNA was the molecule of inheritance. Griffith's experiment involved mice and two types of pneumonia – one was virulent and the other non-virulent. He injected the virulent pneumonia into a mouse and the mouse died. Next he injected the non-virulent pneumonia into a mouse and the mouse survived. -
Phoebus Levene
In 1929 Phoebus Levene at the Rockefeller Institute identified the components that make up a DNA Molecule. -
Oswald Avery discovered that DNA is the material of which genes and chromosomes are made
Oswald Avery continued with Griffith’s experiment around a decade later to see what the inheritance molecule was. In this experiment he destroyed the lipids, ribonucleic acids, carbohydrates, and proteins of the virulent pneumonia. Transformation still occurred after this. Next he destroyed the deoxyribonucleic acid. Transformation did not occur. He had found the basis of the inheritance. -
Alfred Hershey and Martha Chase confirmed that DNA was the genetic material.
Oswald Avery continued with Griffith’s experiment around a decade later to see what the inheritance molecule was. In this experiment he destroyed the lipids, ribonucleic acids, carbohydrates, and proteins of the virulent pneumonia. Transformation still occurred after this. Next he destroyed the deoxyribonucleic acid. Transformation did not occur. He had found the basis of the inheritance. -
Watson and Crick
In 1953, two scientists, James Watson and Francis Crick, were trying to put together a model of DNA. They took a look at Franklin and Wilkin's picture of the X-ray and made their model.
They created a model that has not been changed much since then. Their model showed a double helix with little rungs connecting the two strands. These rungs were the bases of a nucleotide. -
Fred Sanger
Sanger discovered the formylmethionine tRNA which initiates protein synthesis. -
Alec Jeffreys
The DNA was first used to convict Colin Pitchfork in 1988 in the Enderby murders case in Leicestershire, England. Thus began the journey of DNA research. -
Human Genome Project
Was an international scientific research project with a primary goal to determine the sequence of chemical base pairs which make up DNA and to identify and map the approximately 20,000–25,000 genes of the human genome from both a physical and functional standpoint -
The first colon life named Dolly!!!
The cell of Dolly used as the donor for the cloning of Dolly was taken from a mammary gland, and the production of a healthy clone therefore proved that a cell taken from a specific part of the body could recreate a whole individual. On Dolly's name, Wilmut stated "Dolly is derived from a mammary gland cell and we couldn't think of a more impressive pair of glands than Dolly Parton's".