Reptile & Amphibian Forums

Where can I find some info on the results of crossing simple resesive traits and co-dom traits?

Genetically Speaking

Naara.net

Thanks for the link! Specifically though I was curious about the punnet square of a codom (like a pastel) to a snake with a simple resessive gene (like a ghost). Thanks!

RE
Advanced Genetics Wizard

I tried the genetics wizard but if you select 2 traits the only options are dom and co-dom. I could not figure how to show a recessive to a co-dom.

for the recessive do not check any box

n/p

The Punnett square for two independant mutants always works the same way. It doesn't matter whether both mutants are recessives, both are codominants, both are dominants, one is recessive and the other is dominant, etc.

First you work out all possible genotypes of the male's sperm and put them on the top of the Punnett square (or side; it doesn't matter). Then you work out all possible genotypes of the female's eggs and put them on the side of the square. Then you combine each of the sperm with every possible egg and add up all the identical genotypes.

Personally, I prefer the branching system to the Punnett square. But the final results are the same.

Paul Hollander

http://www.reptimania.co.uk/repgenetics.htm
Link