Re: [MLUG - DISCUSSION] cloning

["Vern Green" <EMAIL:PROTECTED>]

Honestly, I never really had a problem with color blindness, until I entered my current profession. Now when I am talking to people when designing websites I have to be careful to know exacty what color is on the screen, or not mention any color at all.

 

I do a pretty good job of hiding it, but occasionally someone will catch me. Then of course there is a lot of laughter about me misidentifying the color. In a way it is probably a lot like being handicapped and having people poke fun. Usually though, when I say "Well I am color blind." they usually are very apologetic about it and cast their eyes down in shame.

 

The thing is I have a pretty good spirit about it, and am always to happy to answer all of their questions about what colors I do see. It is always interesting when I tell them that the grass can actually look orange, or how I judge the red stop lights from the green lights...

 

Anyway, more information than anyone wanted to hear I am sure.

 

On 10/5/06, Mike Miller <EMAIL:PROTECTED> wrote:

On Thu, 5 Oct 2006, Vern Green wrote:

> Well I know that my sons have the condition with the little finger, and
> my sister has it, as did my mother.

It is likely autosomal dominant.  That means that 1/2 of your offspring
will inherit the gene and they would then have a very high chance of
having the trait.


> Additionally one would have to wonder about Color blindness. I am color
> blind and the way color blindness works is it skips a generation, but it
> is hereditary in nature.

X-linked recessive.  That means that you cannot pass it to a son, but you
can pass the gene to a daughter.  A daughter will not be color blind
though, usually, because she will have a good copy of the gene from her
mother.  But the daughter is a carrier, so 1/2 of her sons would be color
blind.


> I guess what I am asking is if the trait manifested itself with me,
> would it by nature HAVE to manifest in my clone? This was not something
> that was externally influenced, but does a trait HAVE to manifest for it
> to be a full clone?

If the kind of X-linked recessive color blindness that you have has 100%
penetrance, then your clone will also be colorblind.  If penetrance is
less than 100% but it is controlled by other loci (genes), then your clone
will be color blind because you share all those other genes with your
clone.  If something that controls penetrance (e.g., some environmental
effect) is not shared with your clone, then the clone might not be color
blind -- it could be partly a chance outcome.  But with what I know about
color blindness, I'm going to say that I'm almost certain that your clone
will be color blind.

Mike

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-- 
Thanks
F Vernon Green 
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