genetic geeks

Quote:

---

Originally Posted by Louie1

I have a pretty good idea when it comes to double recessive but not on triples or quads

---

Are you good with punnet squares? I think that's probably the easiest way to visualize the probable genetic make up of the offspring. For triple and quad recessive, you just keep adding them in.

Odds for having a homozygous animal are single recessive is 1/4, double is 1/16, triple is 1/64, etc etc. For any trait its not homozygous for it has a 2/3 chance of being het for it.

So lets say you crossed two het clown, ghost, xanthic together. There would be 1/64 chance of getting a animal homozygous for all three. There would be a 1/16 chance of getting one that was homozygous for two of the genes, and a 1/4 for getting one that was homozygous for at least one of them.

So lets say you got a clown from that pairing. That clown would then have a 2/3 chance (or 66%) of being het for ghost OR xanthic. It would actually have a 4/9 chance of being het ghost AND xanthic.

But if you do the punnet square, these ratios will make a lot more sense...

Quote:

---

Originally Posted by Louie1

I have a pretty good idea when it comes to double recessive but not on triples or quads

---

Have you written out a punnet square with double?

The same idea applies, you look at all possible outcomes for the genotypes, throw them into a square, and cross.

http://www.newenglandreptile.com/gen...e.html#dblhet2

Quote:

---

Originally Posted by Freakie_frog

here wrap your brain around this

1.56% WT
3.12% Het. Axanthic,
1.56% Homozygous Axanthic,
3.12% Het. Albinodc,
6.25% Het. Albinodc, Het. Axanthic,
3.12% Het. Albinodc, Homozygous Axanthic,
1.56% Homozygous Albinodc,
3.12% Homozygous Albinodc, Het. Axanthic,
1.56% Homozygous Albinodc, Homozygous Axanthic,
3.12% Het. Clowndc,
6.25% Het. Clowndc, Het. Axanthic,
3.12% Het. Clowndc, Homozygous Axanthic,
6.25% Het. Clowndc, Het. Albinodc,
12.5% Het. Clowndc, Het. Albinodc, Het. Axanthic,
6.25% Het. Clowndc, Het. Albinodc, Homozygous Axanthic,
3.12% Het. Clowndc, Homozygous Albinodc,
6.25% Het. Clowndc, Homozygous Albinodc, Het. Axanthic,
3.12% Het. Clowndc, Homozygous Albinodc, Homozygous Axanthic,
1.56% Homozygous Clowndc,
3.12% Homozygous Clowndc, Het. Axanthic,
1.56% Homozygous Clowndc, Homozygous Axanthic,
3.12% Homozygous Clowndc, Het. Albinodc,
6.25% Homozygous Clowndc, Het. Albinodc, Het. Axanthic,
3.12% Homozygous Clowndc, Het. Albinodc, Homozygous Axanthic,
1.56% Homozygous Clowndc, Homozygous Albinodc,
3.12% Homozygous Clowndc, Homozygous Albinodc, Het. Axanthic,
1.56% Homozygous Clowndc, Homozygous Albinodc, Homozygous Axanthic,

---

Dude, your nuts thats hurting my head. :rolleye2::rolleye2: