ezto.mheducation.com Course: 18SP General Biology (non-Majors) (BiO-1113-TW025)

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ezto.mheducation.com Course: 18SP General Biology (non-Majors) (BiO-1113-TW025) Suppose that two scientists conducting research at the Galápagos Islands find finches with a beak shape that had never unique beak shape. Finches with this mutation have long, narrow beaks that allow them to pick grubs out of logs. Grubs are common on this island, and no other finches can eat them, so this mutation is highly favorable. Starting with a DNA mutation, arrange the events to explain how the new beak shape became common in the population mRNA is translated into protein Mutated DNA is transcribed mRNA leaves the nucleus One nucleotide is substituted for another in finch DNA type Introns are removed from mutated mRNA Natural selection favors unique beak type A mutation occurs Reset esc F2

Explanation / Answer

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Mutations are caused in the gene by various factor, some mutation can be lethal and others can be beneficial.

Transcription is a process where the gene gets transcribed into messenger RNA.

This mRNA undergo post transcriptional modification namely 5'capping, splicing of introns, and polyadenylation.

The mRNA is then exported to the cytoplasm where the translation begin.

During translation polypeptide chain is synthesized with the help of Ribosome and tRNA.

Once the polypeptide strand is synthesized it undergo post translational modification to become fully functional.

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