Watson e Crick

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Apresentação de Português, biografia e contributos para a humanidade

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  • Vida e Descobertas de  Watson and Crick Rafael  e Guilherme   
  • Mrs. Coley What T.H.Margan did in 1910?
  • Morgan discoveries elucidating the role that the chromosome plays in heredity.
  • Morgan's research moved to the study of mutation in the fruit fly Drosophila melanogaster. In his famous Fly Room at Columbia University, Morgan demonstrated that genes are carried on chromosomes and are the mechanical basis of heredity. These discoveries formed the basis of the modern science of genetics.
  • DNA Sotory Timeline
  • 1951,  numcongresso internacional consagrado ao tema da estrutura de moléculasencontradas em células vivas, Francis Crick conheceu James Watson,  juntos, elaboraram o modelo dadupla hélice para a molécula de DNA.
  • What's about Frederick Griffith ?
  • . Griffith used two strains of pneumococcus (Streptococcus pneumoniae) bacteria which infect mice – a type III-S (smooth) and type II-R (rough) strain. In this experiment, bacteria from the III-S strain were killed by heat, and their remains were added to II-R strain bacteria. While neither alone harmed the mice, the combination was able to kill its host. Griffith was also able to isolate both live II-R and live III-S strains of pneumococcus from the blood of these dead mice. Griffith concluded that the type II-R had been "transformed" into the lethal III-S strain by a "transforming principle" that was somehow part of the dead III-S strain bacteria.
  • What he used in his experiment?
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