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Mendel's paper
This idea was not recognized for 34 years. The paper was about dominate and recessive traits ; equel segeration ;independent assortment. -
DNA discovery
The significance of this discovery is not appreciated for 70 years. completely change the fundamental understanding of life as we know it. -
rediscovered mendals experiment
Carl and two other scientist thought thye where discovering something new when they where discovering something mendal had already discovered. Results where easier for there generation to accept because of the microscope. -
Chromosome Theory
recognizes that individual chromosomes are different from one another. he doesn't make a connection to Mendelian principles. -
chromosome theory of heredity is confirmed
T.H. Morgan and colleagues prove the theory. This is a large step for biology and understanding life. -
X-rays induce mutations
With all the advancements this is one of the down falls. This shows what technology can do to a person. -
heat-killed virulent bacteria can "transform"
a non-virulent strain to become virulent, as shown by Fred Griffith. Griffith will later on work on a way to counter react this discovery. -
Genetic recombination
caused by a physical exchange of chromosomal pieces. which is later shown in corn. -
gene encodes one protein
Genes encodes one protein. this is very help in a way that it helps us better understand the way in which our bodies work. -
DNA is the molecule that mediates heredity
Most people where very skeptical until 1952. This scared a lot of people because of how new this information was. -
Genetic material can be transferred
laterally between bacterial cells. Lederberg and Tatum where the lead scientist on this discovery. -
A and T
In DNA equal amounts of C and G, However, the A+T to C+G ratio can differ between organisms. -
DNA is the molecule that mediates heredity
as shown in bacteriophage labeling experiments by Alfred Hershey and Martha Chase. This confirmation of the 1944 results really convinced everyone. -
double helix
antiparallel nucleotide chains and specific base pairing. This was deduced by Watson and Crick, who used Rosalind Franklin's data provided by Maurice Wilkins. -
DNA replication
semi-conservative, as shown by Meselson and Stahl using equilibrium density gradient centrifugation. -
Genome projects
the yeast genome is complete in 1996, and the C. elegans genome is done in 1998. -
DNA microarrays
invented by Pat Brown and colleagues. -
DNA fingerprinting
gene therapy, and genetically modified foods come onto the scene. -
Dolly the sheep
The first cloning of a mammal is performed by Ian Wilmut and colleagues, from the Roslin institute in Scotland. -
human and animal cloning
research on stem cells, and genetic modification of crops. This scars people in what could happen next.
