Genetics questions you were afraid to ask...

[Ssthisto]

Originally Posted by MissMoose

proper stupid question but (Royals):

het axanthic male x normal female = ?

het axanthic male x het spider female = ?


thankyouuu =]

OK. First, if you have the "het spider" female.... does she LOOK like a Spider? If not... she isn't het Spider at all. Sorry, but she's a normal. Spider, being a dominant trait, means that animals that carry the gene at all (whether het or homozygous) show the trait.

Now, to do your crosses, I'm going to do a couple of letter definitions:

X is for "Normal-not-Axanthic" which is the dominant trait of the Axanthic pair.
x is for "Axanthic" which is the recessive trait of the Axanthic pair.
S is for "Spider" which is the dominant trait of the Spider pair.
s is for "Normal-not-Spider" which is the recessive trait of the Spider pair.

So, a Het Axanthic male crossed to a normal female can be shown as:

Xx crossed to XX

In half of the breedings, the male will pass on his x trait, but the female can only EVER pass on an X trait - you have the following possible results:

X (from dad) X (first X from mum)
X (from dad) X (second X from mum)
x (from dad) X (first X from mum)
x (from dad) X (second X from mum)

All the babies have at least one X (normal-not-Axanthic) gene, so they'll all look normal. And because you can't tell whether they're carrying the gene or not, they're all "50% possible het" Axanthic - there's a 50% chance in each baby that they did inherit Dad's Axanthic gene. Unfortunately, the only way to find out for sure is to breed them to a known Axanthic carrier - ideally, a visual Axanthic.

Now Het Axanthic X Heterozygous Visual Spider would be expressed as:

Xx ss crossed to XX Ss

This is because Spider and Axanthic do not share the same gene pair; you've got to write out each one separately.

Here you've got a 50% chance of Mum passing along her Spider gene; you've got a 50% chance of Dad passing along his single Axanthic gene.

From here I wouldn't actually do a punnett square or work out the letters individually - I'd just think "50% of 50% is 25% therefore there's a 25% chance per egg I'll get a Spider het Axanthic." (if Spider was a recessive trait, the chance would be lower, by the way) There's also a 25% chance per egg you'll get a complete normal carrying neither trait at all.

Again, you won't know which of the babies are het Axanthic because it doesn't show - but you WILL know which of the babies are heterozygous Spider because they'll look like Spiders!

And a Het Axanthic X Normal-Looking animal from Spider Ancestry would be shown as:

Xx ss crossed to XX ss

As you can see there is no dominant Spider gene to pass on - all of the crossings produce normal-non-Spiders. It's essentially the same cross as het Axanthic to Normal.

[MissMoose]

cheers mate =]

[repkid]

What would a SHCT x a Mack snow create?

[Ssthisto]

Hypos and Mack Hypos.

[repkid]

Ok thanks. I just wanted to know incase my dad doesnt let me get a super snow leo to breed with the mack snow.

[repkid]

I was wondering if my mack snow was really a mack snow due to the fact that instead of having white on its back it has yellow on its back?

brad

[freekygeeky]

the whiter ones are the ''''bettter ones'''
and the yellowy ones are the ''not so good macks'' personalyl though i have both and i love both lol

Originally Posted by repkid

I was wondering if my mack snow was really a mack snow due to the fact that instead of having white on its back it has yellow on its back?

brad

[repkid]

Are mack super snows and super snows the same thing? If not then whats the difference?

[Ssthisto]

A Mack Snow is an animal who is heterozygous ("het" - has only one copy) for the Mack Snow gene.
A Super Snow is an animal who is homozygous (has two copies) of the Mack Snow gene.

[PSGeckos]

Originally Posted by Ssthisto

A Mack Snow is an animal who is heterozygous ("het" - has only one copy) for the Mack Snow gene.
A Super Snow is an animal who is homozygous (has two copies) of the Mack Snow gene.

I know this is going off on a tangent a bit but this is what i thought and have read about the Enigmas being heterozygous and homozygous, so surely there then must be a super form of the Enigma???