Introduction Flashcards
Epigenesis declines
Preformation, fully developed mini adult inside egg
William Harvey
Proposed epigenesis - fertilized egg goes through series of developmental stages
Schleiden and Schwann
suggested cell theory
Cell theory
All living things composed of cells
cells come from preexisting cells
Cells are structural and functional units of life
Darwin
Proposes continuous evolution of species by means of natural selection, but did not know mechanism of variation and heredity
Mendel
heredity is passed down in discrete units
Introduces use of statistics in biology
observed dominant and recessive traits
“Father of Genetics”
Walter Sutton
Chromosome Theory of Inheritance: heredity and development due to generic info contained in chromosomes
Sutton’s theory completes
Darwin’s theory
Genetics
Study of heredity and variation
Avery, MacLeod, McCarty
Discovery of DNA as hereditary molecule
Watson, Crick, Franklin, Chargaff
discovered structure of DNA using x-ray crystallography
Genes code for
Proteins
Proteins result in expression of
Genes
Each species has a typical number of
Chromosomes
Polymerase Chain Reaction uses
Restriction enzymes do copy DNA