Originally posted by boaz:
scientific explanation here provided---
hair lost = genes + environment.
If the environment is the same, the answer lies in the genes.
Hair-lost-related genes are located on Y chromosome primarily.
Human genetics in a nutshell, a normal male has got 2 different sex chromosomes: X and Y; in contrast, a normal female has 2 similar sex chromosomes, denoted as XX.
Since the hair-lost genes are mainly on Y chromosomes, naturally men are more prone to this problem. In fact women rarely have hair-lost problem until the extent of baldness.
Of course marginal amount of hair loss is part of metabolism, no worries fellows.
Some jap researchers have worked out something that is sheerly a delight for all bald men. They argue that those bald men tend to develop great ability to reason and calculate. They are better in physics and mathematics.
So those bald friends, time to rejoice. God has chosen u all to become great physicists and mathematicians!!
your theorires are all wrong. People like u are the reason why scam companies prmoting hair producs make a lot of money.
The baldness gene lies in the X chromosome, means it is mum
http://www.abc.net.au/news/newsitems/200506/s1390247.htmMum's genes blamed for male hair loss
Researchers in Germany have found that variations in a gene related to male sex hormones may be at the root of male-pattern baldness, the most common form of hair loss.
The culprit is the androgen receptor gene, and it dwells on the X chromosome, which all men inherit from their mothers.
Experts have long believed that hair loss in inherited but the new research, to be published in the American Journal of Human Genetics, is the first to identify a specific gene that may be involved, according to the study authors.
Other, yet-unidentified genes are likely involved in male-pattern baldness, possibly including ones handed down by fathers.
The new findings highlight the importance of the mother's side of the family when it comes to a man's hairline, according to the study authors, led by Dr Markus M Nothen of the University of Bonn.
A young man concerned about the future of his hair may do better to look toward his maternal grandfather's hair history rather than his father's, according to the researchers.
Their study included 95 German families in which at least two brothers had begun losing their hair before the age of 40.
Using blood samples from these men and other family members without early hair loss, the researchers found that a particular variant in the androgen receptor gene occurred much more frequently among men with early male-pattern baldness compared with men who retained a full head of hair past the age of 60.
The androgen receptor gene helps govern the workings of male sex hormones (androgens), such as testosterone.
Though these hormones promote the growth of body and facial hair, on the scalp excess androgens may cause hair loss.
It is possible, according to Dr Nothen and his colleagues, that the suspect gene variant creates a greater number of androgen receptors in the scalp and therefore stronger androgen activity.
The researchers say they are continuing to hunt down the other genes involved in early-onset male-pattern baldness.
Scientists hope that getting at the genetic roots of hair loss will eventually spawn better baldness treatments or a cure.
-Reuters