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Man, they are driving me NUTS....whatever happened to simple recessive traits.

Ok, I THINK I have this figured out but maybe somebody who has a better understanding of the different morphs can help me out if I am wrong.

I was given an Anerytheristic Motley Corn. I just picked up another Anery Motley Corn. Now am I correct in my thinking that these two when they are bred together, will give me Anery Motley babies. I know I will get all Anery babies. It's the motley part that I am having a hard time grasping. I know it's not a simple recessive gene. Is there a possibility of Stripes from this pairing because stripe is related to Motley? Will they be all motley or is there a chance for regular markings. Anybody have a clue?
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2.9.8 Leopard Geckos
1.2.1 African Fat-tails
0.1 Gonisaurus Luii
1.1 Central American Banded Geckos
0.1 Gargoyle Gecko
1.1 Calabar Pythons
1.1 Savu Pythons
0.0.2 Cornsnakes
0.1.2 Chondropythons
0.1 Standing's Day Gecko
1.0 Frog-eyed Gecko
1.1 Ball Pythons

You have TWO independent simple recessive mutant genes here.

Anerythristic x anerythristic --> all anerythristic

Motley x motley --> all motley

Put them together, and you get --
Anerythristic motley x anerythristic motley --> all anerythristic motley

You won't get any normal pattern babies from your anerythristic motley x anerythristic motley cross. And you won't get any striped unless both parents have a striped mutant gene paired with a motley gene rather than each having a pair of motley genes. Hope that helps.

Paul Hollander

Ok, Then I guess they need to rewrite the Corn Manual to make it a tad clearer.

Quote: "Although the Striped and Motley corns breed true in the sense that they don't produce normally patterned offspring when bred together, they don't always beget babies with as unusual patterns as the parents." It then goes on to explain that when bred to a normal it acts as a recessive but when bred to another Motley or a striped weird things happen, suggesting the two are different versions of the same allele and can act Co-dominant. See why I was a tad confused
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2.9.9 Leopard Geckos
1.2.3 African Fat-tails
0.1 Gonisaurus Luii
1.1 Central American Banded Geckos
0.1 Gargoyle Gecko
1.1 Calabar Pythons
1.1 Savu Pythons
1.1 Cornsnakes
0.1.2 Chondropythons
0.1 Standing's Day Gecko
1.0 Frog-eyed Gecko
1.1 Ball Pythons

Quote: "Although the Striped and Motley corns breed true in the sense that they don't produce normally patterned offspring when bred together, they don't always beget babies with as unusual patterns as the parents." It then goes on to explain that when bred to a normal it acts as a recessive but when bred to another Motley or a striped weird things happen, suggesting the two are different versions of the same allele and can act Co-dominant. See why I was a tad confused

Bill Love is good, but none of us is perfect. 8-/

A few years ago a guy showed me some corns that he said were from a mating of a motley to a striped. They looked more or less intermediate between the two parents to me. They certainly were not as different from normal as the striped parent. So Bill might have been clearer, but he was mostly accurate.

If the motley and striped mutants were independent, the babies from a motley x striped mating would look normal. The actual results indicate that the babies have one motley gene paired with one striped gene, making the babies heterozygous motley/striped. And as the babies are more or less intermediate in pattern between the parents, the motley and striped mutants are codominant compared to each other. However, both are still called recessives because both are recessive when compared to the normal version of the gene.

Heterozygous motley/striped x normal should produce
1/2 normal (heterozygous motley)
1/2 normal (heterozygous striped)

Heterozygous motley/striped x motley should produce
1/2 motley
1/2 heterozygous motley/striped

Heterozygous motley/striped x striped should produce
1/2 striped
1/2 heterozygous motley/striped

Heterozygous motley/striped x heterozygous motley/striped should produce
1/4 striped
2/4 heterozygous motley/striped
1/4 motley

IOW, there are three alleles at the motley locus -- the normal (wild type) allele, the motley mutant allele, and the striped mutant allele.

Paul Hollander

Hey thanks Paul.

You know I took a Genetics glass in College, I did great on all the mendalian stuff but Mendal never dealt with corns and genes that can act recessive most of the time and Co dominant in some circumstances. LOL. Like I said I am still learning Corn snake genetics.
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2.9.9 Leopard Geckos
1.2.3 African Fat-tails
0.1 Gonisaurus Luii
1.1 Central American Banded Geckos
0.1 Gargoyle Gecko
1.1 Calabar Pythons
1.1 Savu Pythons
1.1 Cornsnakes
0.1.2 Chondropythons
0.1 Standing's Day Gecko
1.0 Frog-eyed Gecko
1.1 Ball Pythons

Motley is simple recessive and if both parents have motley markings, the babies will have motley markings. I would never say it was impossible, but very unlikley you will get striped from motley parents.