STEP 1: "Build" the mRNA molecule, matching the RNA nucleotides to the DNA nucleotides properly, letter by letter. (For purposes of simplicity, it will be assumed that this mRNA is bacterial; there are no introns to cut out!) STEP 2: Figure out the tRNA triplets (codons) that would fit the mRNA triplets (letter by letter). STEP 3: Look up each tRNA codon in the tRNA Dictionary (below), and find the corresponding symbol and amino acid abbreviation for that codon. Record that one-letter symbol (and its amino acid) below each codon. "Spc" = "space". If you have done this correctly, the symbols should spell out a meaningful message in English. Remember, C always pairs with G, G always pairs with C, A pairs with T or T pairs with A (in DNA). In RNA, C always pairs with G, G always pairs with C, A pairs with U or U pairs with A. Clues: C & G are curved letters; A & T are angular; U is used in RNA in place of T. When you finish the sample message below, decode the special message assigned to you (from the DNA Messages 1-30). Be sure to show the details of your solution on the student answer sheet provided, and hand it in. Be sure to show the details of your solution on the Practice Sheet provided, and hand it in. In your DNA exam, you will be expected to do this from memory (provided with the tRNA Dictionary). PARTIALLY SOLVED MESSAGE GIVEN: DNA code message--> GAA TAG AAA CTT ACT TAG AGC ATT CCT GCC CTT CGA TGC ATC SOLUTION (steps 1-4) 1. mRNA (built to match
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
We are given a partially solved message where DNA segment is given and we have to wrire the mRNA sequence, tRNA and amino acids.
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Solved in 3 steps