D.N.A Definition (simple)

DNA is located in the living cell. It is made to look like two twisting strands. These strands are attacted by hydrogen. The order of the chains is what makes everything different and special.

DNATimeline:

1951:

-Mr. Waston goes to a lecture on DNA. -Linus Pauling discovers the structure of keratin
-Mr. Watson meets Mr. Crick at Cambridge
-Mr. Watson memorizes the water content of DNA
-Watson and Crick build a model of DNA as a triple helix (they were wrong)
1952:
-Mrs. Franklin takes a picture of DNA (B form)
-Watson travels to London and tells Wilkins about Pauling thinking DNA was a triple helix. Wilkins shows Watson Franklin’s double helix
-Watson and Crick discover the pairs are not g-g or t-t rather a-t or c-g
1953:
-Gamow hints that DNA is the secret for making proteins
1959:
-Downs syndrome chromosome deformity is discovered
1960:
-Messenger RNA is identified
1961:
-Marshal Nirenberg discovers the first three letter genetic codes
1962:
-Crick, Watson, and Wilkins win the Noble Prize
1969:
- Harvard Medical School discovers a segment of DNA bacteria that plays a part in sugar metabolism
1972:
-Paul Berg cuts genes form viruses to create the first molecules of recombinant DNA
-Bruce Ames discovers DNA reasoning for cancers
1977:
-Gilbert and Sanger separately come up with ways to sequence DNA
1978:
-Genentech scientists clone human insulin
1982:
-US FDA approves insulin produced from bacteria
1984:
-Jeffreys develops genetic fingerprinting and uses it to identify people
1985:
-Gallo and Momtagnier reveal the genetic sequence that causes HIV and AIDS
1986:
-Leroy Hood creates the first automatic DNA sequence
-The FDA pass genetically engineered vaccine for Hepatitis B
1988:
-Harvard was the first to genitically alter an animal (mouse)
1989:
-The first genetic screening test is proformed on embryos to determine their sex
1993:
-Students at George Washington University clone human embryos and raise them in vitro fertilization
1995:
-DNA micro arrays are used to rapitly anylize large amounts of DNA
1997:
-Wilmutt claim they have cloned a sheep named Dolly
1998:
-Scientists grew embryonic stem cells inside a Petri dish
1999:
-America grives the death of Jessie Gelsinger (death caused by gene therapy)
2000:
-Venter and Collins announce that they have sequenced the entire human genome
2002:
-Scientists at A&M University clone a cat (CC)