Hello Chris,
I've got results of a dopa test on Tremper albinos, they're t+. I'm
looking for another Rainwater sample to test and maybe some of the
other strains that are floating around (Mark Bell's, Mark Leshcok's,
etc...). It took me a few tries to standardize the test (which is how I
lost my first precious Rainwater sample) but I've got it down now.
I'm giving a talk at the Minnesota Academy of Sciences meeting later this
month about my preliminary results with leopard gecko albinism.
Tuesday, April 03, 2001, 10:32:57 PM, you wrote:
C> I do know that when crossed together, Tremper X Rainwater, the offspring
C> resulting are normals. Personally, I'd like to see tyrosine positive and
C> negative testing done. FYI (not directed to anyone in particular, just a
C> general statement), albinism is the lack of melanin, or black and brown
C> pigments. Thus why in our lovely critters we see an emphasis in oranges,
C> yellows, reds, and other non-melanin pigments. In other words, where we see
C> black or brown in normals, albinos hatch pink or white. I take take this
C> into a little more depth about tyrosinase (enzyme) and tyrosine (amino
C> acid), but I don't I don't want to bore anyone :)
C> Later,
C> Chris
C> ----- Original Message -----
C> From: Beverly Erlebacher <[EMAIL PROTECTED]>
C> To: <[EMAIL PROTECTED]>
C> Sent: Tuesday, April 03, 2001 2:02 PM
C> Subject: Re: [Gecko] meaning of "hypo"
>> > Date: Tue, 3 Apr 2001 14:20:40 -0400
>> > From: Julie Bergman <[EMAIL PROTECTED]>
>> >
>> > Someone care to respond?
>>
>> As other people have said, 'hypo' means less, fewer, under, while
>> 'hyper' means more, higher or above.
>>
>> I think your original question was whether 'tangerine' leos should
>> really be called 'hypo'. My understanding is that the leos called
>> hypomelanistic have fewer black spots and/or spotting over a smaller
>> area than the wild type. The extreme seems to be leos with spots only
>> on the head and tail. 'Tangerine' is supposed to be the condition
>> where the orange color sometimes found in patches on the tail appears
>> elsewhere on the body. Judging from the photos I see on the web, it's
>> possible that some of the animals being called tangerine are actually
>> very intense 'high yellows', or 'hyperxanthics', geckos with an
>> especially bright yellow base color, compared to the pale yellow or
>> beige base color of the wild type, but colors don't always appear
>> accurately in on-line images.
>>
>> As for tangerines 'really' being hypomelanistics, it looks like most of
>> the tangerines breeders are producing are *also* hypomelanistics. This
>> is a reasonable thing for breeders to do, since the tangerine color
>> shows up best on an animal with less black. AFAIK, both the
>> 'tangerine' and the 'hypomelanistic' appearance depend on many genes,
>> and the two traits are inherited independently. I don't know whether
>> there is a connection between 'tangerine' and 'high yellow', although
>> all the pictures I've seen of tangerine geckos have also been high
>> yellows. It would be interesting to know whether 'snow' and tangerine
>> could be combined. 'Snow' is hypoxanthism, animals with less yellow
>> than normal, approaching white base color in the extreme.
>>
>> AFAIK, the only monogenic or simple Mendelian traits in leos are
>> albino, patternless and blizzard. I don't know if Tremper albinos
>> and Rainwater albinos are two separate traits, or different alleles
>> of the same gene.
>>
>> If any of the above is out to lunch, anyone more knowledgable please
>> correct me. Most of my knowledge of leo genetics is second to nth
>> hand. I published some papers on fungal genetics long ago but since
>> then the organism I worked with has been thrown out of the fungal
>> kingdom!
--
Best regards,
Tony mailto:[EMAIL PROTECTED]
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