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Genetic Code
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Slide 1

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

Slide 2

Genes

Genes

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

Slide 3

Allele

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)

Slide 4

Homologous chromosomes

Homologous chromosomes

Two chromosomes which contain the same genes but may contain different alleles

Slide 5

DNA nucleotides

DNA nucleotides

Phosphate group

Pentose sugar

Nitrogenous base

Slide 6

Phosphodiester bond

Phosphodiester bond

Slide 7

Sugar phosphate

Sugar phosphate

backbone

Nucleotide

Polynucleotide

chain

Slide 8

4 different bases

4 different bases

Slide 9

Sugar phosphate

Slide 10

Double helix

Double helix

5end

5end

3end

3end

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