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.
Transcription is defined as the process by which the information present in a DNA strand is copied into a new messenger RNA molecule.
Transcription error will accelerate the aggregation or grouping of a peptide that will be implicated in Alzheimer's disease and, thus, shortens or decreases cells' lifespan. The mutation is involved in Alzheimer's disease, and it will occur on three chromosomes include chromosome 21, chromosome 14, and chromosome 1. The mutation on the 21 chromosome will result in the formation of an abnormal amyloid precursor protein, a mutation on chromosome 14 results in the formation of presenilin 1, and mutation on chromosome 1 leads to the formation of abnormal presenilin 2, resulting in Alzheimer.
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