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Practice Reading: Reading and Writing Fill in the Blanks ID: #49791 DNA
Instructions
Whether  you  have  blue  eyes  or  brown,  lactose  tolerance  or  intolerance,  curly  hair  or  straight,  the  roots  of  these  traits  
in  your  DNA.  Deoxyribonucleic  Acid  (DNA)  is  the  hereditary  material  in  humans  and  almost  all  other  organisms,  containing  the  biological  instructions  that  make  each  species  unique.  DNA,  first  identified  in  the  late  19th  century  and    structure  as  a  double  helix  was  discovered  in  1953  by  Watson  and  Crick,  is  present  in  the  nucleus  of  every  cell  in  an  organism.  It's  estimated  that  if  unwound  and  linked  together,  the  strands  of  DNA  in  one  cell  would  stretch  almost  6  feet  in  length.  For  many  years,  the  complexity  of  DNA  made  understanding  the  full    of  its  influence  a  distant  dream.  However,  with  the    of  advanced  genomic  technologies,  scientists  have  made  groundbreaking  strides  in  understanding  and  mapping  the  human  genome.

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