Genes genetic code

Section 28 11 Three RNAs are involved m gene expression In the transcription phase a strand of messenger RNA (mRNA) is synthesized from a DNA tern plate The four bases A G C and U taken three at a time generate 64 possible combinations called codons These 64 codons comprise the genetic code and code for the 20 ammo acids found m proteins plus start and stop signals The mRNA sequence is translated into a prescribed protein sequence at the ribosomes There small polynucleotides called... 

GENESEQ GENESIS Gene therapy Genetic code Genetic colonization Genetic engineering... 

Translation of the Foreign Gene. The translation of a mRNA into a protein is governed by the presence of appropriate initiation sequences that specify binding of the mRNA to the ribosome. In addition, not all the codons of the genetic code are used equally frequently by all organisms. 

Every gene contains DNA with a unique sequence of bases forming a genetic code containing the information an organism uses to iive and repiicate itseif Many years of research have resuited in an understanding of how the information content of DNA is transiated into particuiar biochemicai substances and how DNA repiicates. The processes inciude unwinding of the DNA doubie heiix so its code can be read or dupiicated. 

Genetic code Sequence of nucleotides along the DNA and coded in triplets (codons) along the mRNA that determines the sequence of amino acids in protein synthesis. The DNA sequence of a gene can be used to predict the mRNA sequence, and subsequently to predict the amino acid sequence. 

Genetic factors appear to be the primary determinants of obesity in some individuals, whereas environmental factors are more important in others. The specific gene that codes for obesity is unknown there is probably more than one gene. 

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