Re: ALBINO BREEDERS--I need some input in technical genetics

[ Follow Ups ] [ Post Followup ] [ The Rat Snake Forum ]

Posted by Paul Hollander on April 03, 2002 at 11:40:55:

In Reply to: ALBINO BREEDERS--I need some input in technical genetics posted by jeff schofield on April 02, 2002 at 21:02:12:

: I have posted on this and other forums before about my yellow rat project. Basically, there are ruby-eyed albinos, red-eyed albinos, and axanthic genes all thrown in and I'm trying to figure out what is what. These were CB01 and at the time there was an obvious difference between the ruby-eyes and the red-eyes. Now, after 9 months of metamorphasis, one of the 3 red-eyed has turned ORANGE and 1 of the 5 ruby-eyed looks like it may be a red X ruby. Given that the punets say 2 types of single gene(red and ruby--1/4), one double gene(red X ruby--1/16)and one triple(orange--1/64)traits are POSSIBLE... the odds are stacked against me getting these results in 13 offspring.I ask if its posssible that with both t+ and t-, albinism is variable.I have seen Dight Goods pic of the alb. black rat with normal eyes and put a question forward--given these sets of circumstances is albinism variable??? I have asked and I havent heard of any other species that this has occured in. Anyone with any info or opinions kindly apply. This is a NEAT but frustrating project.LOL.Jeff

Disclaimer: I may have seen a picture of a yellow rat mutant, but I've never seen one in the flesh. I have been a full-time technician for several years in a university genetics lab working with ringneck doves and mice.

BTW, it's Punnett square, named for R.C. Punnett, the early British geneticist who devised it.

Albinism may be variable. But it sounds to me as if you are working with three mutants, probably each with its own locus. Combinations can make a difference, and there may be variation at one or many of the 30,000 or so other loci in the rat snake genome.

Have the yellow rat snake albinos been tested for tyrosinase activity? If not, then naming them t+ and t- is a crap shoot. Neither might be t- or the wrong one might be named t- without a test.

I don't have a clue to what is going on in your stock, partly because I haven't seen your records. At least I hope you have been keeping records, because without records you are up the creek without a paddle. You also may have to do some outcrossing to normal and see what segregates and assorts in the F2 generation to get some idea of what you have.

Dunno if this is much help, but it sounds like an interesting project.

Paul Hollander

Follow Ups:

thanks for the help paul, more jeff s 04/03/02 (1)
- Re: thanks for the help paul, more Paul Hollander 04/03/02 (0)

Post a Followup

Name:
E-Mail:

Subject:

Comments:
: : I have posted on this and other forums before about my yellow rat project. Basically, there are ruby-eyed albinos, red-eyed albinos, and axanthic genes all thrown in and I'm trying to figure out what is what. These were CB01 and at the time there was an obvious difference between the ruby-eyes and the red-eyes. Now, after 9 months of metamorphasis, one of the 3 red-eyed has turned ORANGE and 1 of the 5 ruby-eyed looks like it may be a red X ruby. Given that the punets say 2 types of single gene(red and ruby--1/4), one double gene(red X ruby--1/16)and one triple(orange--1/64)traits are POSSIBLE... the odds are stacked against me getting these results in 13 offspring.I ask if its posssible that with both t+ and t-, albinism is variable.I have seen Dight Goods pic of the alb. black rat with normal eyes and put a question forward--given these sets of circumstances is albinism variable??? I have asked and I havent heard of any other species that this has occured in. Anyone with any info or opinions kindly apply. This is a NEAT but frustrating project.LOL.Jeff : Disclaimer: I may have seen a picture of a yellow rat mutant, but I've never seen one in the flesh. I have been a full-time technician for several years in a university genetics lab working with ringneck doves and mice. : BTW, it's Punnett square, named for R.C. Punnett, the early British geneticist who devised it. : Albinism may be variable. But it sounds to me as if you are working with three mutants, probably each with its own locus. Combinations can make a difference, and there may be variation at one or many of the 30,000 or so other loci in the rat snake genome. : Have the yellow rat snake albinos been tested for tyrosinase activity? If not, then naming them t+ and t- is a crap shoot. Neither might be t- or the wrong one might be named t- without a test. : I don't have a clue to what is going on in your stock, partly because I haven't seen your records. At least I hope you have been keeping records, because without records you are up the creek without a paddle. You also may have to do some outcrossing to normal and see what segregates and assorts in the F2 generation to get some idea of what you have. : Dunno if this is much help, but it sounds like an interesting project. : Paul Hollander

Optional Link URL:
Link Title:
Optional Image URL:

[ Follow Ups ] [ Post Followup ] [ The Rat Snake Forum ]