Punnett Square

I have a question in regards to doing punnett squares. I know the basics of how to set them up with single gene animals. I can also set them up when both animals are double gened. I am just curious how you would set up a square for breeding a single gene morp to a double gene morph. Do you have to add extra filler letters to the single gene? Just something I would find convenient to know instead of using the calculators online.

Brennan

I don't even bother trying to figure it out manually anymore...

www.worldofballpythons.com/wizard

Somebody should have paid attention in high school biology.

If I understand what you're talking about no. Just remember that the recessive gene will only show if there are two of it in the offspring (homozygous). If there is only one, then the animal is heterozygous for that gene and the trait will not show.

Yes I know I can be lazy and use those. I just wanted to understand it better on my own of how that works.

I understand the recessive thing well. I was mostly referring to if I bred a pastel to a spinner how would the punnett square look when setting it up since one snake only has one trait gene and the other has two traits to account for.

Lets say you have a pastel and a bumblebee. Let's say P for pastel and S for spider.

Pastel = Ppss
Spider = ppSs
Bumblebee = PpSs

So you would set it up as Ppss x PpSs
And you would get

25% PP 50% Pp 25% pp
50% Ss 50% ss

Combine the two and you would have

12.5% PPSs super pastel spider (killerbee)
12.5% PPss super pastel
25% PpSs pastel spider (bee)
25% Ppss pastel
12.5% ppSs spider
12.5% ppss normal

ok that makes sense. Just pretending that the pastel has the recessive spider gene when setting it up. That answers my question nicely. Thanks much for that.

There are a few ways to set it up, I find this the easiest....You list all the potential genotypes you can get from each parent, using the above example

Pastel x Bumblebee

Pastel = Ppss
Spider = ppSs
Bumblebee = PpSs

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Originally Posted by All Balled Up

ok that makes sense. Just pretending that the pastel has the recessive spider gene when setting it up. That answers my question nicely. Thanks much for that.

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its not so much that it has a "recessive spider" gene other than it does not have the spider gene. There is no "recessive" spider gene, thus a lower case would signify a normal gene in that locus.

Quote:

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Originally Posted by nock

Somebody should have paid attention in high school biology.

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Are you even ABLE to answer a thread without insulting the OP? Wether or not you have a BS in math means nothing for your character. You are a pompous bully.

Quote:

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Originally Posted by Foschi Exotic Serpents

Are you even ABLE to answer a thread without insulting the OP? Wether or not you have a BS in math means nothing for your character. You are a pompous bully.

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No, apparently this person cannot post without having a sarcastic attitude. Being a pompus bully is a polite way of describing this person.