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Genetic code

Genetic code. Lesson 1: The structure of DNA Objectives : I can describe the structure of DNA, I can explain the difference between an allele, a gene and homologous chromosomes. Genes.

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Genetic code

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  1. Genetic code Lesson 1: The structure of DNA Objectives: I can describe the structure of DNA, I can explain the difference between an allele, a gene and homologous chromosomes

  2. Genes • Genes are sections of DNA that contain coded information that determines the nature and development of organisms

  3. Allele • A different form of a particular gene, positioned in the same relative position (locus) on homologous chromosomes Homologous chromosomes Gene locus – position on the chromosome Alleles (diff versions of the genes)

  4. Homologous chromosomes • Two chromosomes which contain the same genes but may contain different alleles

  5. DNA nucleotides Phosphate group Nitrogenous base Pentose sugar

  6. Phosphodiester bond

  7. Nucleotide Polynucleotide chain Sugar phosphate backbone

  8. C G A T 4 different bases

  9. Double helix 5’end 3’end 3’end 5’end

  10. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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