Interesting article about Y chromosome

[chewbaca]

http://www.bookrags.com/sciences/geneti ... e-wog.html

Genes located uniquely on the Y chromosome are said to be Y-linked. These genes are passed exclusively from father to son. Early in the history of medical genetics, such traits as baldness were thought to be Y-linked because males express the condition fair more commonly than females. Additional study has shown that baldness and other similar characteristics are in fact sex-influenced. This means that rather than a specific Y-linked gene for baldness, it is the higher production of male hormones that is the contributing factor to baldness. There are very few confirmed Y-linked disorders

 

[chewbaca]

Females have two X chromosomes, and males have an X and a Y. Offspring get one chromosome from the mother and one from the father. The chromosome from the father determines whether the offspring becomes male or female. The father can pass the baldness gene to his daughter with his X chromosome (the daughter doesn’t go bald - she just carries the gene). Her sons then have a 50-50 chance of becoming bald, depending on which one of her two X chromosomes she gives her sons. If you are bald, and your father is also bald, it’s coincidental, not genetic. Your father would have gotten his baldness gene from his mother’s father, and you got yours from your mothers’ father. Your father gave you a Y chromosome (obviously because you are male), which doesn’t carry the baldness gene.

 

[chewbaca]

http://www.wrongdiagnosis.com/genetics/ygene.htm

Y-linked Genetic Diseases

The Y chromosome is a sex-linked chromosome. Men are XY and women are XX, so only men have a Y chromosome. The Y chromosome is very small and contains few genes.

Y-linked transmission: The Y chromosome has a trivially simple inheritance pattern because women are XX and men are XY. Only men have a Y chromosome and so the Y is only passed from father to son. The Y chromosome is small and does not contain many genes. There are few genetic diseases related to genes on Y.

Male sex determination: The main Y gene is called the SRY gene, which is the master gene that specifies maleness and male features. It is the single gene that sets off the initial cascade of hormone changes that make a person male. It is not the entire Y chromosome, but just this gene that is necessary for maleness. There is evidence of this in rare diseases where the SRY gene is missing. People who are genetically male with XY chromosomes, but with a mutation or deletion of this SRY gene on the Y chromosome, will be female despite having most of the Y chromosome. And people who are genetically female with XX but also have a tiny piece of the Y chromosome with this gene, will become male despite their female-like XX chromosomes.

 

[jumpedthegun]

i thought that whole theory was disproven.

besides, even if it is passed down from the mother, and not the father, that doesn't mean you'll get your mom's dad's hair. you could get the hair of any male on your mom's side of the family, including her dad's, either of her granddad's, and so on. in other words, there are probably plenty of bald gene's on your mom's side of the family even if her dad has a full head of hair.

 

[chewbaca]

i thought that whole theory was disproven.

besides, even if it is passed down from the mother, and not the father, that doesn't mean you'll get your mom's dad's hair. you could get the hair of any male on your mom's side of the family, including her dad's, either of her granddad's, and so on. in other words, there are probably plenty of bald gene's on your mom's side of the family even if her dad has a full head of hair.

the theory has resurfcaced with the latest research..plseas upate yourself. and not post ignorant facts here.

 

[chewbaca]

It has genetically benn proven tat the Y chromosome contaians very few genes to pass on inherited diseases.

If u are having baldness and you father has too, it is just co incicdence

 

[Old Baldy]

Yes Chew, it appears that one old myth might not have been a myth afterall.

 

[chewbaca]

i seen quite a number of men whose dads had a thick hair right up to their death beds. Yet these men lost their hair in their 30s.

 

[chewbaca]

Yes Chew, it appears that one old myth might not have been a myth afterall.

The myth appeared somewhere in 1916 when 2 researchers proposed the idea...and now with the dramatically grown human genome project, the latest research says the old myth about mum's fault might be true afterall...

Look at it in one way, the X chromosome is where all life starts and it is quite logical that workings of the the human physique lies in this gene. Hence the high number of X-linked genetic diseases compard to Y...Y seems to be mainly sex linked

male pattern baldness is inherited..But it needs male hormones to drive it. Just like an engine needs fuel to run..the Male Hormones are the fuel in this case, if u take it away completely, the male pattern baldness engine cant run...

The engine inherited from MUm determines how good or bad the engine runs. Next it needs the male hormones as fuel..Even if the fuel is there, if the engine is not good, then the male pattern baldness is only effective to a certain level..

U can compare my theory with cars, engine and fuel efficiency ect..

 

[chewbaca]

anyne in the field of Biosciences, pls do comment on wat u think...