Alleles & Homologous Chromosomes

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  • Alleles & Homologous Chromosomes
    • gene can exist in more than one form
      • called alleles
        • order of bases in each allele  slightly different
          • code for slightly different versions of same polypeptide
    • 23 pairs of chromosomes, 46 in total
      • pairs of matching chromosomes - homologous pairs
        • both chromosomes are same size & have same genes
          • could have different alleles
            • alleles coding for same characteristic found at same locus on each chromosome

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