9 Genetic Quirks from Everyday Life
Have you ever thought about the fact that all people have many similar genomes? Why are we all different then? The answer is simple: each of us has genetic quirks that develop some unique traits. Moreover, this happens more often with a change in the environment. Differences usually appear in eye/hair color, but sometimes the changes are more significant. Here are 9 genetic quirks that you probably don’t notice in your daily life.
At the beginning of human history, we did not have blue eyes. This is a small mutation that has awarded about 8% of people with a unique trait. The first man with blue eyes was born in one of the Spanish cities about 7 thousand years ago. Up to this point, people have had gray and brown eyes. After conducting the research, the experts said that the eyes turned blue due to a lack of brown pigment or its complete absence.
Many people cannot recover until they have had their morning coffee. Perhaps you are one of them. If so, you should know that this is due to your genes. Caffeine has different effects on certain genotypes. Some of them perceived caffeine as a stimulant that should be included in their daily diet.
This “trend” is very popular these days. Milk is a popular and essential product for the health of every person. But reaching adulthood, many of us lose the ability to digest it. Humans began to domesticate cows about 10,000 years ago. At that moment, a mutation occurred that allowed most of them to produce enzymes for digesting milk. Only most of them.
Short sleep syndrome
Even after a long sleep of 10 hours, some people wake up tired and even exhausted. Others cut their sleep to a couple of hours and feel great. If you sleep no more than 4 hours, you have a special genome that restores energy in your body many times faster.
Sometimes it seems that each of us has a good red-haired friend. In fact, this hair color is very rare and only occurs in 5% of people. Most of them are born in Eastern European countries. Scientists hypothesize this mutation is due to the lack of enough sun. Be that as it may, red-haired people surely feel unique. Hm, have you ever met a redhead with blue eyes?
No wisdom teeth
They are associated with pain and a mandatory visit to the dentist. When they do appear, dentists say that the treatment does not make sense, and these teeth must be removed. Hundreds of thousands of years ago, wisdom teeth were a must for people because their daily diet consisted of raw meat and tough plants. Thanks to better quality food, we don’t need these teeth. Therefore, they are absent in 20% of Americans, 10% of African Americans, and 40% of Asians.
Bright light makes you sneeze
Perhaps this is happening to you, but you simply do not notice it. The truth is that some people sneeze when they look at the sun or bright light. Nowadays, this is observed in almost 30% of people, and the genetic feature has even received a special name – the light sneeze reflex.
This is expressed in the facial vessels that expand when a person drinks an alcoholic beverage. Although this symptom is harmless, it indicates alcohol intolerance, and in this case, you need the advice of a specialist.