“Boys look like mom, girls look like dad”
“Intelligence follows mother, character follows father”
……
I believe everyone has heard of these common heredity statements, but did you know that breast size, mate selection criteria and the daily increase in hair loss are also related to genetics?
Come and see if these genetically dominated characteristics hit you!
1. Fat and thin may really be born
Why do some people eat dry food without gaining weight, while others drink cold water and gain weight?
(Source: Internet)
It’s actually about genes!
Research shows that heredity is the main reason for obesity. If both parents are obese, there is a 75% chance that their children will also be obese. Of course, environmental interference cannot be ruled out. For example, diet and living habits are largely influenced by parents.
But don’t worry too much, even having obesity genetics just means you’re more likely to be obese, not necessarily obese[1].
So when the meat on your stomach explodes, don’t just blame your parents, think about the crayfish, ice cream, hot pot, barbecue, potato chips, xiaolongbao… …genes are not good enough, but you can still work hard the day after tomorrow!
2. IQ is not just a mother
Intelligence quotient is indeed inherited, but the sayings that “North-South combination children have high IQ” and “Intelligence quotient follow their mother” are not very good. Reliable!
According to research, the heritability of IQ in adolescence is about 0.83 to 0.84 (the closer the absolute value of the correlation is to 1, the stronger the correlation). Among them, Girls’ IQ is more likely to be influenced by genetics[2].
But in childhood, IQ is largely influenced by the environment around you. This is also the reason why everyone looks similar when they are young, but when they enter middle school or high school, everyone’s abilities are widened.
Speaking of this, Zhimei, who did not understand mathematics in junior high school, shed tears of remorse!
Image source: Zhanku Hailuo
3. Which cancers may be inherited?
According to JAMA, about one-third of all cancers are caused by genetics. 55% to 60% of common breast cancers are hereditary. If a mother develops breast cancer, her daughter’s risk of breast cancer is 2-3 times higher than others.
Famous movie star Angelina Jolie voluntarily removed both breasts at the age of 37 due to her family’s inherited cancer susceptibility gene. In addition, ovarian cancer, liver cancer, gastric cancer, and nasopharyngeal cancer also have strong genetic predisposition. If the family has a history of the above cancer, it is recommended to go to the hospital for regular check-ups.
Image source: Zhanku Hailuo
4. How much myopia can be passed on to children?
Some studies suggest that heredity is the main factor causing high myopia (more than 600 degrees) [3].
If both parents were highly myopic, their children were 2.6 times more likely to develop myopia. Therefore, parents with high myopia should sound the alarm and cultivate children’s good eye habits from an early age.
Image source: Zhanku Hailuo
5. Why does my mother have big breasts and I am flat?
Breast size is related to genetics, age, breastfeeding, and weight.
But genetics largely determines the size and shape of your breasts, so those “breast-as-daddy” sisters look back at your moms, aunts, and aunts, they’re probably with you have the same trouble.
Of course this is not absolute, there will also be women in the whole family who have big breasts, but you are small. At this time, Zhimei can only bless you who are “safe and safe”. Every xiong becomes auspicious.”
Image source: Zhanku Hailuo
6. Grandpa and father are bald, can I still help?
Hair loss is a combination of genes and environment.
The most common type of hair loss is androgenetic alopecia, a disease characterized by a receding hairline and thinning hair on both sides, also known as “Mediterranean”[4]. (Among patients with alopecia, father baldness is more likely to be passed on to children.)
Women are much more fortunate in this regard. In general, androgenetic alopecia in women is relatively uncommon because the symptoms are less pronounced than in men and are easily overlooked. If present, it is mild, and total baldness at the top is rare. More common are nutritional alopecia and endocrine alopecia, which are manifested as thinning and soft hair.
Image source: Zhanku Hailuo
7. The partner you choose may be born by fate
Why do some people feel good at first sight, and some people don’t like it?
In fact, it is also related to strong genes! Humans are more likely to seek out genetically similar heterosexual partners. So “love at first sight” may really be doomed.
Of course, parental values cultivation in the process of growing up also has a great influence on mate selection. So cherish the people around you, after all, Ta has gone through many tests of genes and environment to come to you~
Image source: Zhanku Hailuo
8. Some people are born with “violence genes”?
In addition to social and psychological factors, violent aggression is also closely related to a MAOA gene on the X chromosome[5].
MAOA is an important metabolic enzyme in the human brain that controls the supply of an important chemical in the brain. When the MAOA gene is mutated, it increases a person’s tendency to violence [6]. However, this theory is still controversial in academic circles.
However, it is safe to say that genes are not the main factor contributing to violent behavior, social upbringing is more important. But violence for any reason should end immediately!
Image source: Zhanku Hailuo
Although heredity and genes are beyond our control, “three points are destined, seven points depend on hard work” (Hey, why did you sing along…) Even if we can’t choose genes, You can still choose how to control your life~
Reviewers:
Li Jie| Chief Physician, Department of Dermatology, Xiangya Hospital, Central South University
Yang Fangru| Deputy Chief Physician, Mental Health Center, Xiangya Hospital, Central South University
References
[1]DELRIO G. Adrenomedullary function and its regulation in obesity .Int J Obes Relat Metab Disord, 2000, 24 ( Suppl 2) :89-91.
[2]Silventoinen K,Posthuma D,van Beijsterveldt T,Bartels M, Boomsma DI. Genetic contributions to the association between height and intelligence: evidence from Dutch twin data from childhood to middle age[ J].GenesBrainBehav,2006,5(8):585-595.
[3]Goss D A et al . J Am Pto Ass oc, 1998, 59. 875-883.
[4] Lei Ming, Feng Suyun, Wang Jiping. Genetic analysis of male androgenetic alopecia patients. Western Medicine, 2018, 07.
[5] Liu Huafeng, An experimental study on the association between 5-HT and MAOA gene polymorphisms and aggressive behavior and nutritional intervention.
[6] Fu Ying. Association between violent criminal behavior and MAOA gene VNTR polymorphism, environment and psychological characteristics.
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