Discussion:
Exons and Introns
A human gene was initially identified as having three exons and two introns. The exons are 456, 224, and 524 bp, while the introns are 2.3 kb and 4.6 kb.
(a) Draw the gene, showing promoter, 5' UTR, 3' UTR, introns, exons.
(b) Surprisingly, it is found that this gene encodes not one but two mRNAs that have only 224 nucleotides in common. The original mRNA is 1,204 nucleotides, while the new mRNA is 2,524 nucleotides. Explain how it is possible for this one region of DNA to encode these two transcripts. How does this change what was believed to be the original order of exons.
Attachment:- Codon table.rar