Single Nucleotide Polymorphisms (SNPs) and Their Meanings
Single Nucleotide Polymorhisms (SNPs) are single letter changes in the genetic code differing from individual to individual. Every individual has two copies of the same genes but genes differ in single letters from one individual to another. Most of the time these differences do not hurt anybody. In other words, they do not change the meaning of a gene. Despite these minute individual differences genes are conserved enough to carry out their functions.
Let's say "Jack has brown eyes" is the letter by letter sentence, i.e. the gene coding for brown eyes.
Most of the time a small typo such as "Jack has brownn eyes" will be interpreted correctly and beautiful brown eyes are not affected by this minute change.
Some people with brownn eyes have this particular version of the genes and it is fully functional.
However, in certain cases a minute letter change can revert the meaning of the entire sentence as the following example;
"Pardon impossible, to be sent to Siberia."
OR
"Pardon, impossible to be sent to Siberia."
"Sent it to Siberia."
OR
"Do NOT send it to Siberia."
Similarly, depending on where the small individual change on your HSPA1A gene is you may have or not have Coronary Heart Disease risk. Depending on where the minute change on your BRCA1 gene is you are predisposed or not predisposed to Breast Cancer.
New Generation DNA sequencing technology reads all your DNA with alternative typos and tells you who you are.
Relevant:
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