all im wondering is if anyone could explain which morphs are recessive, which are dominant and which are co dominant. also what is all this about strains of morph etc. just need lecture i guess but i did a genetics exam today for my a level and i am just intrigued as i understand all the terminology and principles etc just dont know it in context of leos. any help would be appreciated. cheers sam

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0:2 Normal Leopard Geckos
0:1 Mack Snow Leopard Gecko
0:1 Mack Snow Blizzard Leopard Gecko
1:1 SHTCT Leopard Gecko
1:1 Bearded Dragon
0:1 Red Tegu

Recessive Morphs:
Tremper Albino
Bell Albino
Las Vegas (Rainwater) Albino
Murphy Patternless
Blizzard
Eclipse (probably)
Reverse Stripe (probably)

Codominant traits:
Mack Snow (Two copies makes a super snow)
Giant (Two copies make a super giant)
Hypomelanistic (Two copies makes a super hypo)

Dominant traits:
Enigma
Mack Pastel

Selectively bred traits:
High yellow
Tangerine
Patternless Reverse Stripe

As far as "strains" go, it's probably far better to remember that "Bell Albino" is no more the same morph as "Tremper Albino" than it is the same morph as "Patternless". The three types of "albino effect" genes are totally different morphs and work in different ways.

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- Ssthisto





Lizards: 2.1 E. macularius, 1.2 H. caudicinctus, 1.0 R. ciliatus, 0.2.1 A. fragilis, 1.1 T. merianae, 1.0 V. niloticus ittibittius
Colubrids: 3.5.12 P. guttattus, 1.0 P. guttatus X E. climacophora, 1.1 P. o. rossalini, 1.0 P. o. lindheimeri, 0.1 E. anomala, 0.1 C. radiatus
1.2 Lamprophis spp, 1.0 L. g. nigritus, 0.1 L. g. californiae, 1.0 H. n. nasicus, 1.0 P. m. melanoleucus
Boids: 1.1 E. c. maurus, 0.1 E. conicus, 4.1.5 P. regius, 1.1 A. maculosa
We HAD a three-bedroom house... Current lodger: 1.0 E. c. maurus

ok cheers, i have a mack snow male het for blizzard and rainwater albino and also have a mack snow blizzard. what wil i get if i cross these? also what is the difference between a mack snow blizzard and a blizzard, or a super snow blizzard for example? cant see much difference in physical appearance. would really appreciate your time to cover this. with regards to co dominance when you say that two are required to form super snow what d u mean mate? sorry i know you prob get annoyed answering similar questions.

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0:2 Normal Leopard Geckos
0:1 Mack Snow Leopard Gecko
0:1 Mack Snow Blizzard Leopard Gecko
1:1 SHTCT Leopard Gecko
1:1 Bearded Dragon
0:1 Red Tegu

Mack snow het blizzard and Las Vegas (Rainwater) Albino X Mack Snow Blizzard =

12.5% Normal het Blizzard
12.5% Blizzard
25% Mack Snow het Blizzard
25% Mack Snow Blizzard
12.5% Super Snow het Blizzard
12.5% Super Snow Blizzard

All of these would have a 50% chance of being het for Las Vegas albino as well.

A Mack Snow Blizzard is homozygous for Blizzard and heterozygous for the Mack Snow gene. These animals are hatched out light grey/white with a paler head than a normal blizzard.

A normal blizzard is only homozygous for the blizzard gene. They hatch out light grey/white with a darker grey head.

A Super Snow blizzard is homozygous for the Blizzard gene AND the Mack Snow gene. I'm not sure what they hatch out like, but I'm guessing they are pretty pale, and have solid black eyes.

The definition of Codominant is simple:

An animal with no copies of the named gene has appearance A.
An animal with one copy of the named gene has appearance B.
An animal with two copies of the named gene has appearance C.

There are three distinct appearances, depending on whether they've got none, one or two genes for the morph. In the case of Mack snows:

No copies of Mack Snow = Normal.
One copy of Mack Snow = Visual Mack Snow.
Two copies of Mack Snow = Visual Super Snow.

In order to GET two copies, both parents have to be at LEAST Mack Snows.

__________________
- Ssthisto





Lizards: 2.1 E. macularius, 1.2 H. caudicinctus, 1.0 R. ciliatus, 0.2.1 A. fragilis, 1.1 T. merianae, 1.0 V. niloticus ittibittius
Colubrids: 3.5.12 P. guttattus, 1.0 P. guttatus X E. climacophora, 1.1 P. o. rossalini, 1.0 P. o. lindheimeri, 0.1 E. anomala, 0.1 C. radiatus
1.2 Lamprophis spp, 1.0 L. g. nigritus, 0.1 L. g. californiae, 1.0 H. n. nasicus, 1.0 P. m. melanoleucus
Boids: 1.1 E. c. maurus, 0.1 E. conicus, 4.1.5 P. regius, 1.1 A. maculosa
We HAD a three-bedroom house... Current lodger: 1.0 E. c. maurus

cheers i appreciate that loads. that breaks it down so much and any time i need help ill give u a shout. thanks again.

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0:2 Normal Leopard Geckos
0:1 Mack Snow Leopard Gecko
0:1 Mack Snow Blizzard Leopard Gecko
1:1 SHTCT Leopard Gecko
1:1 Bearded Dragon
0:1 Red Tegu

At least leopard geckos don't appear to have morphs that are allelic - where certain morphs 'share' gene pairs and make codominance much harder to explain

Royal pythons have the whole "White Snake" complex - where:

Lesser Platinum is codominant to itself, normal, Mojave, Russo Lemon Line, Phantom, Butter and "Dilute/Daddy". Each combination has slightly different results... some of which are blue-eyed white snakes.
Mojave is codominant to normal, itself, Russo Lemon Line, Phantom, Butter and Dilute/Daddy (and Lesser).
Russo Lemon is codominant to all of the above, as are Phantom and Butter.

But Dilute/Daddy is a weird one. It's codominant to the "mutant" genes (Mojo, Lesser, Phantom, Butter, Russo) ... and recessive to normal. A het Dilute animal is normal in appearance.

I don't know if anyone knows yet what a homozygous dilute looks like...

__________________
- Ssthisto





Lizards: 2.1 E. macularius, 1.2 H. caudicinctus, 1.0 R. ciliatus, 0.2.1 A. fragilis, 1.1 T. merianae, 1.0 V. niloticus ittibittius
Colubrids: 3.5.12 P. guttattus, 1.0 P. guttatus X E. climacophora, 1.1 P. o. rossalini, 1.0 P. o. lindheimeri, 0.1 E. anomala, 0.1 C. radiatus
1.2 Lamprophis spp, 1.0 L. g. nigritus, 0.1 L. g. californiae, 1.0 H. n. nasicus, 1.0 P. m. melanoleucus
Boids: 1.1 E. c. maurus, 0.1 E. conicus, 4.1.5 P. regius, 1.1 A. maculosa
We HAD a three-bedroom house... Current lodger: 1.0 E. c. maurus