Reptile & Amphibian Forums

If someone can shed some light on the following, it would be appreciated: Are any of the current proved out brooks morphs i.e. hypo, anery, peanut butter, etc. co-dom or are all the genes recessive?

Simply put...

ALL the Morphs are Recessive.

The "Peanut Butter" and Amelanistic T- (NOT lavender albino) are "Co-allelic" WITH AND ONLY WITH EACH OTHER.

~ZF

The old genes and all the new genes are reccessive.

Old traits:
hypo
anery/axanthic
lavender albino (T positive)
Whitesided

New genes:
Peanut Butter
Albino (T negative)

>>The old genes and all the new genes are reccessive.
>>
>>Old traits:
>>hypo
>>anery/axanthic
>>lavender albino (T positive)
>>Whitesided
>>
>>New genes:
>>Peanut Butter
>>Albino (T negative)

Hate to sound like a fool
but what is the difference between recessive and dominant if you were explaining it to a moron..... (not me tho)

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Life moves pretty fast, if you dont stop and look around once and a while,... you could miss it. www.myspace.com/CobraCorps

A simple reccessive trait is like an albino. When you breed an albino to a normal you will not get normals but hets. With a dominant trait the color or pattern is passed on directly to any snake you breed it to.. it does not skip a generation.

OK, I admit it!!!!! In spite of $60,000 worth of education and two degrees I'm a moron!!!!!! What happens if you have two recessives (eg. hypo and whiteside) breed???? What do the kids look like?

Shalom Y'all!!!!

Pat

Normal, but they're double het.
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1.1.0 Hondurans Het Amel
1.1.0 Hondurans Anery, Het Hypo
0.1.0 Honduran Hypo
0.1.0 Honduran Hypo, Het Anery
0.2.0 Pueblans
1.0.0 Pueblan Hypo
1.0.0 Thayeri MSP
0.0.1 GBK Blair's Phase
1.0.0 California King
0.1.0 California King Blue-eyed Blond
0.0.1 Speckled King WC
0.0.1 Jungle Carpet
0.1.0 Ball, Normal
1.0.0 San Diego Gopher, Poss. Het Applegate
0.0.1 Sulcata
0.1.0 Girlfriend, Caucasius Mexicana, Fiancee Phase

http://www.cafepress.com/shedz

Here are links to a couple of good articles on the subject:

http://www.naturalselectionreptiles.com/Genetics/101: Basics.html

http://www.naturalselectionreptiles.com/Genetics/201: Predicting Crosses.html

http://www.naturalselectionreptiles.com/Genetics/301: Complex Dominance.html

http://www.ralphdavisreptiles.com/matrix/squares.asp
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1.1.0 Hondurans Het Amel
1.1.0 Hondurans Anery, Het Hypo
0.1.0 Honduran Hypo
0.1.0 Honduran Hypo, Het Anery
0.2.0 Pueblans
1.0.0 Pueblan Hypo
1.0.0 Thayeri MSP
0.0.1 GBK Blair's Phase
1.0.0 California King
0.1.0 California King Blue-eyed Blond
0.0.1 Speckled King WC
0.0.1 Jungle Carpet
0.1.0 Ball, Normal
1.0.0 San Diego Gopher, Poss. Het Applegate
0.0.1 Sulcata
0.1.0 Girlfriend, Caucasius Mexicana, Fiancee Phase

http://www.cafepress.com/shedz

Hey Thanks!!!!!
Pat

All - thanks very for your responses. I have one additional question - can anyone explain the difference between T positive (lavender albino) and T negative (Albino)? What does this exactly mean?

the T in T-neg or T-poss,stands for (spell?)Tyrosinaise a visual pigment, T possitive has this aka lavender, Where the T negative is minus this pigment as in Amelanistic

Albino (T-) Amelanistic:

Amelanism (Tyrosinase negative) is a congenital mutation that is the result of an amino acid disorder that results (in) “Hypopigmentation” of systematic (organs) and ocular (eyes) tissue.
The pigmentation in cells is dependent on the cell’s ability to manufacture and isolate melanin. Melanin is synthesized from the amino acid tyrosine by the enzyme tyrosinase. This process occurs within organelles called melanosomes which are located in cells called melanocytes. These melanocytes are responsible for the pigmentation of cells (for example skin and eyes cells)
In Albinism (T-) tyrosinase is not present, the amino acid tyrosinase can not be synthesized therefore melanin is absent. A total lack of dark pigment is the result, leaving dark areas white and red pupils.

Lavender Amelanistic (T+):

In the "Lavender" (Tyrosinase positive) mutation the Tyrosinase enzyme is present but the cells are unable to isolate the synthesized melanin in the melanosomes. This results in lavender/brown pigmentation as well as ruby red pupils.

> Melanin is synthesized from the amino acid tyrosine by the enzyme tyrosinase.

Actually, tyrosinase converts tyrosine into L-dopamine. That conversion is just the beginning of the process required to make melanin. Several more steps and other enzymes are needed to synthesize melanin from L-dopa.

As far as I know, nobody has actually tested brooksi albinos for tyrosinase. So these albinos may be T-positive albinos or may be T-negative albinos.

Here's how to tell the difference between a dominant mutant gene and a recessive mutant gene. Look at an animal with a gene pair made up of a normal gene and a mutant gene. If the animal looks normal, then the mutant gene is recessive to the normal gene. If the animal does not look normal, then the mutant gene is dominant to the normal gene.

Paul Hollander