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Published byAllyson Merritt Modified over 9 years ago
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DNA Structure & Function
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Perspective They knew where genes were (Morgan) They knew what chromosomes were made of Proteins & nucleic acids They didn’t know which one was the gene Better case for proteins
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The DNA Structure Watson and Crick Used model exploration Rosalind Franklin X-ray crystallography Chargaff’s rule A-T; G-C
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DNA Replication Life reproduces itself Genes (DNA) are inherited How does the structure of DNA make it easy to replicate itself for cell division?
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DNA Replication
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Cloning
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Genes: How they work Review the flow of information from DNA RNA protein All our traits that are expressed (physical, biological, and chemical) is produced by proteins
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Genes: How they work
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The Genetic Dictionary
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Transcription
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RNA Processing
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Translation How does the codon on mRNA get translated into an amino acid? Adapter molecule?
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Transfer RNA (tRNA)
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Translation
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Mutations Knowing the genetic code help us understand inherited disorders A single genetic mutation
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Mutations Any change in the nucleotide sequence of DNA Note: the DNA sequence is not shown here but the RNA and amino acid sequence is represented
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Mutations Base-substitutions can sometimes lead to a beneficial change It’s these beneficial changes that can lead to better adaptations and evolution of new species
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Mutations Mutations are the only source of new genetic material The diversity of life around us is due in large part to random mutations of the DNA nucleotide sequence
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