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(4.1) DNA, Genes & Chromosomes - Coggle Diagram
(4.1) DNA, Genes & Chromosomes
DNA
eukaryotic DNA
linear DNA molecules, exist as chromosomes
chromosomes = thread like structures, each made up of 1 long DNA molecule (found in nucleus)
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mitochondria & chloroplasts also have their own DNA - circular & shorter than nuclear DNA (not associated with histones)
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Genes
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different polypeptides have a different no. & order of amino acids - order of bases determines order of amino acids in polypeptide
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Alleles & Chromosomes
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order of bases in each allele is slightly diffrerent, so they code for slightly different versions of the same polypeptide
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in each homologous pair, chromosomes are same size & contain the same genes although they could have different alleles
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The Genetic Code
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each base triplet is read in a sequence, separate from triplets before & after it
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