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Biology 18 Online
ZoeyBiocth16:

arrange these DNA milestones in chronological order by putting a number from 1 (the earliest) to 11 (the most recent) next to each milestone. _____11_____ The Human Genome project was completed. ___8_______ Linus Pauling proposed the triple helix. ____4______ Mendel published his study of pea plants to determine the laws of inheritance. _______6___ Hershey and Chase confirmed that DNA is genetic material using their famous density gradient centrifuge technique. ______9____ Matthew Stanley Meselson and Franklin William Stahl proved semi conservative replication, showing how DNA unzips to split into two pieces before replicating. ______2____ Rosalind Franklin used x-ray diffraction to determine the structure of DNA. She proposed a helical structure with the phosphate groups on the outside. ____1______ Thomas Hunt Morgan published findings from an examination of genetics of fruit flies and determines chromosomes are the basis for heredity. _____10_____ Arthur Kornberg discovered DNA polymerase, the molecule that is responsible for assembling parts of DNA during replication. ______7____ Reverse Transcriptase was discovered by David Baltimore and Howard Martin Temin. ______3____ Marshall Warren Nirenberg deciphered the genetic code _____5_____Alec Jeffreys developed DNA fingerprinting.

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