Posted by:
grich
at Tue Feb 28 20:03:49 2006 [ Email Message ] [ Show All Posts by grich ]
"Just another thing to consider for those of you who are skeptical. Breed a Leucistic Black rat to a normal....see what you get....Then breed a Leucistic Texas to a normal....see what you get......The results are VERY different, which would suggest two different genes, or slightly different locals on the chromosomes. Also, when you take an F1 from each of the crosses above to a normal, the babies are VERY different again. In the black rat, you will see the "codominance" showing through (in 50% of them), and in the Texas, you will see nothing but normals (possible hets) in all of them. Just something to think about..."
It would be more helpful if you were more explicid in your statement. As it is, it doesn't make any sense.
Nevertheless, I assume you to mean: "Breed a Leucistic Black rat to a normal" (black rat) and "...a Leucistic Texas to a normal" (Texas). If that is what you mean, then I would think one would get two, normal looking types of each that are heterozygous for Leucistic. Naturally, the difference would be that one is a black rat snake and the other is a Texas rat snake.
You really lose me in this statement:
"Also, when you take an F1 from each of the crosses above to a normal, the babies are VERY different again. In the black rat, you will see the "codominance" showing through (in 50% of them), and in the Texas, you will see nothing but normals (possible hets) in all of them. Just something to think about..."
If you take an F1 from the black rat x leucistic black rat results and breed it to a normal black rat snake, you'll get normal black rat snake babies. If you take an F1 from the Texas rat snake x leucistic Texas rat snake results and breed it to a normal Texas rat snake, then you'll get normal Texas rat snakes. That is unless the normals to which you are breeding just happen to be carrying the heterozygous gene for leucitism.
On the other hand, if what you mean to say is-->If you take a pair of F1's from each of these breeding and breed the black rat F1's together, and breed the Texas F1's together, then I would expect to see some normal F2 types of each and some leucistic F2 types of each.
The problem is, I don't know what it is you are trying to say.
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