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DNA Structure & Function. Perspective They knew where genes were (Morgan) They knew what chromosomes were made of Proteins & nucleic acids They didn’t.

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Presentation on theme: "DNA Structure & Function. Perspective They knew where genes were (Morgan) They knew what chromosomes were made of Proteins & nucleic acids They didn’t."— Presentation transcript:

1 DNA Structure & Function

2 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

3 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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6 DNA Replication Life reproduces itself Genes (DNA) are inherited How does the structure of DNA make it easy to replicate itself for cell division?

7 DNA Replication

8 Cloning

9 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

10 Genes: How they work

11 The Genetic Dictionary

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13 Transcription

14 RNA Processing

15 Translation How does the codon on mRNA get translated into an amino acid? Adapter molecule?

16 Transfer RNA (tRNA)

17 Translation

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20 Mutations Knowing the genetic code help us understand inherited disorders A single genetic mutation

21 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

22 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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24 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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