Reptile & Amphibian Forums

where it lists what BP morph crosses produce?
For example:
Pastel Pastel = Super pastel
Albino Normal = normal het for albino
Etc.
-----
3.0 normal Ball python
1.0 66% het stripe ball python
2.2 amel corn snakes
0.1 Blood red Hypo
1.1 Bearded dragons
1.1 Leopard gecko
1 phantom blue merle toy australian shepherd
2.1 cats

>where it lists what BP morph crosses produce?
For example:
Pastel Pastel = Super pastel
Albino Normal = normal het for albino
Etc.

Not that I know of. I think such a site would be horribly repititious and boring.

If you want to make such a list, here is one way to do it.

Genes come in pairs. The male has a pair of genes, gene1//gene2, and the female has a corresponding pair of genes,gene3//gene4. You take one gene from the male and match it to each of the female's corresponding genes to make a pair. Then repeat with the second of the male's genes. There are four possible combinations. You can verify this yourself using marked bits of paper. Result:
1/4 gene1//gene3 (appearance?)
1/4 gene1//gene4 (appearance?)
1/4 gene2//gene3 (appearance?)
1/4 gene2//gene4 (appearance?)

Next, identify the genes and plug them in the four combinations. Example 1 -- Male is albino, and the female is normal. Gene1 = albino, gene2 = albino, gene3 = normal, gene4 = normal. Their babies:
1/4 albino//normal (looks normal)
1/4 albino//normal (looks normal)
1/4 albino//normal (looks normal)
1/4 albino//normal (looks normal)

Add the identical categories together, and you discover that all the babies are albino//normal, AKA het albino, and look normal.

Example 2 -- het albino x het albino. Gene1 = normal, gene2 = albino, gene3 = normal, gene4 = albino. Result:
1/4 normal//normal (looks normal)
1/4 normal//albino (looks normal)
1/4 albino//normal (looks normal)
1/4 albino//albino (albino)

We add the like gene categories together, and we find that we expect 1/4 normal, 2/4 het albino, and 1/4 albino.

We add the like appearance categories together, and we find that we expect 3/4 normal looking babies and 1/4 albino.

Do the same thing with a pastel (pastel//normal) x pastel (pastel//normal) mating. Gene1 = pastel, gene2 = normal, gene3 = pastel, gene4 = normal. What fraction of the babies are super pastel (pastel//pastel)?

This procedure will work for any cross involving a single gene pair. The examples involve only two genes, but the technique will work with four genes, as long as all the genes share the same location in the genome and could be a member of the gene pair under consideration. Crosses involving two or more gene pairs (such as pastel het albino x pastel het albino) take a few more steps.

Have fun.

Paul Hollander

www.geneticswizard.com thats pretty much all I need to say. this site will answer every question you have. altought it does make mistakes (rare)

That is a great site - thanks! I just meshed a male cinny pied to a female black pastel pewter het pied. This is fun!

Bookmarked for later...

JenH