Re: Punnett squares and breeding
and I explained this in an edit but i was over the 10 min mark -_- and I dont feel like typing again so ill put some links. Spiders are a really strange gene so it doesnt work for them and here is more discussion on that (http://ball-pythons.net/forums/showt...er-for-example). I also touched on why pinstripes also had no homozygous forms. Both are very confusing situations since they arent "true" dominant. (http://ball-pythons.net/forums/showt...m-or-dom/page1).
Basically use the co-dom form in a punnett square and know that a homozygous form of the traits aren't a super and as far as everyone knows they dont exist
Re: Punnett squares and breeding
Quote:
Originally Posted by
Soord
One mistake here. A pair of ghost genes is symbolized as gg. So the Pp Bb gg x pp bb gg mating is a pastel butter ghost mated to a ghost. A pastel butter ghost x normal mating would be symbolized as Pp Bb gg x pp bb GG. (G is the normal version of the ghost, or g, gene.)
Pp Bb gg x pp bb GG produces
1/4 Pp Bb Gg
1/4 Pp bb Gg
1/4 pp Bb Gg
1/4 pp bb Gg
The illustration of a Pp Bb gg x pp bb gg mating has 64 boxes in the Punnett square. Upon examination, all 8 rows are identical. Which means that rows 2 through 8 can be deleted, leaving only 8 boxes. The results of the Punnett square do not change, because 8/64 = 1/8. Also, columns 1 and 2 are identical, columns 3 and 4 are identical, columns 5 and 6 are identical, and columns 7 and 8 are identical. One of each set of identical columns can be deleted. That leaves 4 unique boxes. Drawing 4 boxes is a lot less work than drawing 64 boxes and then adding the identical boxes together.
Re: Punnett squares and breeding
Quote:
Originally Posted by
paulh
One mistake here. A pair of ghost genes is symbolized as gg. So the Pp Bb gg x pp bb gg mating is a pastel butter ghost mated to a ghost. A pastel butter ghost x normal mating would be symbolized as Pp Bb gg x pp bb GG. (G is the normal version of the ghost, or g, gene.)
Pp Bb gg x pp bb GG produces
1/4 Pp Bb Gg
1/4 Pp bb Gg
1/4 pp Bb Gg
1/4 pp bb Gg
The illustration of a Pp Bb gg x pp bb gg mating has 64 boxes in the Punnett square. Upon examination, all 8 rows are identical. Which means that rows 2 through 8 can be deleted, leaving only 8 boxes. The results of the Punnett square do not change, because 8/64 = 1/8. Also, columns 1 and 2 are identical, columns 3 and 4 are identical, columns 5 and 6 are identical, and columns 7 and 8 are identical. One of each set of identical columns can be deleted. That leaves 4 unique boxes. Drawing 4 boxes is a lot less work than drawing 64 boxes and then adding the identical boxes together.
True, good catch, didn't realize that. Guess I've been doing too many co-dom genes haha
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Re: Punnett squares and breeding
Quote:
Originally Posted by
paulh
One mistake here. A pair of ghost genes is symbolized as gg. So the Pp Bb gg x pp bb gg mating is a pastel butter ghost mated to a ghost. A pastel butter ghost x normal mating would be symbolized as Pp Bb gg x pp bb GG. (G is the normal version of the ghost, or g, gene.)
Pp Bb gg x pp bb GG produces
1/4 Pp Bb Gg
1/4 Pp bb Gg
1/4 pp Bb Gg
1/4 pp bb Gg
The illustration of a Pp Bb gg x pp bb gg mating has 64 boxes in the Punnett square. Upon examination, all 8 rows are identical. Which means that rows 2 through 8 can be deleted, leaving only 8 boxes. The results of the Punnett square do not change, because 8/64 = 1/8. Also, columns 1 and 2 are identical, columns 3 and 4 are identical, columns 5 and 6 are identical, and columns 7 and 8 are identical. One of each set of identical columns can be deleted. That leaves 4 unique boxes. Drawing 4 boxes is a lot less work than drawing 64 boxes and then adding the identical boxes together.
And yeah in the case of breeding with a normal that works but not with other multi gene. I thought I'd show the full way. Good shortcut though!
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