https://padlet.com/310832/6od3k0y1tn719kyp AP Bio en-us 2020-11-24 15:50:57 UTC 2020-11-24 17:11:38 UTC hello@padlet.com 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956725220 Thomas Morgan began studying fruit flies and found that certain traits of the fruit flies are passed on to their offspring. He found that the genes being passed on are found on the chromosomes. ]]> 2020-11-24 15:51:35 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956725220 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956788130 Frederick Griffith was the first person to demonstrate bacterial transformation. He used two strains of streptococcus and experimented on mice. He found that transforming factors can change the organisms phenotype.]]> 2020-11-24 16:05:55 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956788130 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956806679 The three took the R and S strains used in Griffith's experiment and mixed it with the enzymes proteases and DNase. They found that the transforming factor from Griffith's experiments is DNA. ]]> 2020-11-24 16:10:10 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956806679 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956859117 Chargaff used paper chromatography and UV spectroscopy to study the number of nucleobases. He found that the amount of adenine and thymine are always in balance and same with guanine and cytosine. ]]> 2020-11-24 16:22:14 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956859117 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956880425 Hershey and Chase studied bacteriophages and studied their DNA. They found that DNA was genetic material, not protein. ]]> 2020-11-24 16:26:58 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956880425 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956911297 Wilkins and Franklin studied nucleic acids and proteins through X - ray imaging. They found that DNA is a twisted, double stranded structure with nitrogen bases.  ]]> 2020-11-24 16:34:09 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956911297 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/956946347 Watson and Crick studied the structure of DNA. They described it as a double helix structure with nucleotides facing the outside. ]]> 2020-11-24 16:42:07 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/956946347 310832 https://padlet.com/310832/6od3k0y1tn719kyp/wish/957003591 Meselson and Stahl used 15N and 14N and discovered that DNA replication is a semi conservative replication. This means that each strand in a DNA molecule serves as the base for a new strand. ]]> 2020-11-24 16:55:35 UTC https://padlet.com/310832/6od3k0y1tn719kyp/wish/957003591