Chromosome sex determination query

[helixrenovator]

While aware that two X chromosomes produce a female offspring, and one X and one Y produce the male, and while this does vary amongst organisms, ( and can consequently be reversed in select species), what would occour in the case of two Y chromosomes? Is it even possible? I recall reading a truely entertaining piece of literature, entitled, or rather on the subject of, the science behind the tv show, the x-files, and in the book I remember a paragraph which stated that if a human were created with two Y chromosomes, they would be "alien", so I suppose saying if a "human" were created...is rather contradictory. Is thier any truth behind this concept?

[Skye]

You need the genes on the X chromosomes to live. Males can have an extra Y chromosomes though, XYY or XYYY. This is sometimes called YY syndrome by people who like to be confusing. They aren't alien, not very different from XY men except taller and more active than average

[Radical Edward]

it does vary between organisms too.

[Gampin]

It does vary. But I dont think its called a YY male. Organisms like birds that have males with the same chromosomes and females with different chromosomes have WZ sex determination. WZ = female and ZZ = male.

[helixrenovator]

Skye said in post # :

You need the genes on the X chromosomes to live. Males can have an extra Y chromosomes though, XYY or XYYY. This is sometimes called YY syndrome by people who like to be confusing. They aren't alien, not very different from XY men except taller and more active than average

 

So what presicely does an X chromosome supply that is absent in the Y chromosome?

[Skye]

Proteins, about a thousand of them. At the moment it's easiest to say what not having them does, or at least not having working ones, rather than what they do, because that's when we notice the effects in genetic diseases.

 

Here's a map of the X chromosomes diseases.

 

http://http://www.ornl.gov/sci/techresources/Human_Genome/posters/chromosome/chromoX.shtml

[Radical Edward]

helixrenovator said in post # :

So what presicely does an X chromosome supply that is absent in the Y chromosome?

 

Skye said in post # :

diseases.

 

sexist quote editing