I am not 100% sure but I believe that because of increased manufacturing, the air got very polluted and this made many trees darker, like birch. So moths are usually lighter in color so many couldn’t really hide among trees and they were eaten. After some time, many moths mutated and also became darker to blend in when they were on trees to prevent being eaten by predators. In conclusion, the population decreased.
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So the flowchart should go like this:
Mutation in the CFTR gene >>>>>> Production of defective CFTR protein >>>>>> defective CFTR protein in cell membrane or no protein at all >>>>>>> Impaired ion transport across the cells >>>>>>> Cells secrete less chloride >>>>>>> leads to more re-absorption of sodium and water into the cells >>>>>>> decreased hydration of mucus present outside the cells as more water is absorbed into the cells >>>>>>>> thick viscous mucus.
The mechanism of gene expression initiates with the process of transcription in which the genetic information in the DNA is into genetic codes in the form of messenger RNA.
<h3>What is the process of gene expression followed by transcription?</h3>
The process of gene expression followed by transcription is processed through the messenger RNA which then undergoes some processing such as modification of tails and removal of non-coding sequences before the genetic codes are translated to their respective amino acids in a process known as translation.
The amino acids are typically associated together by peptide bonds and the resulting primary protein structure is folded in specific ways depending on their functions.
To learn more about Gene expression, refer to the link:
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