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Gregor Mendel
-discovered the fundamental laws of inheritance.
-concluded that genes come in pairs and are inherited in distinct units, one from each parent -
Friedrich Miescher
-Isolated nuclein from cell nucleus
-laid groundwork for molecular discoveries that followed. -
Frank Griffith
Griffith discovered transformation which is a change in genotype caused when cells take up foreign genetic material. -
Oswald Avery
Isolated DNA as the material of which genes and chromosomes are made -
Erwin Chargaff
-The number of adenine always equals the number of thymine -The number of guanine is always equals the number of cytosine -The number of purines always equals the number of pyrimidines. -
Rosalind Franklin
-She used a photo technique called photo crystallography to find out the 3d shape of molecules. -She thought the first ever virus might be hollow and may only consist of one strand of RNA -
Hershey-Chase
-A series of experiments that helped confirm that gna is the genetic material. -Discoveries proved that dna was a hereditary material. -
James Watson, Francis Crik
-discovery of the double helix structure. -
Frederick Sanger
Determined exact sequence of amino acids in proteins and of nucleotides in deoxyribonucleic acid -
John Sulston
Was able to build a cell fate map of C. elgans enabling other scientists to compare and use mutants to find genetic defects
