Sorry this is going to get long...Originally Posted by pankthesnake
Usually in genetics PP is used for the wildtype(normal) and pp would be recessive, in this case super pastel, and Pp would be the heterozygous for or Pastel.
http://www.changbioscience.com/genetics/punnett.html
This is the punnett square calulator I use to figure out my genetic frequencies. I'm sure there are better ones out there, heck sometimes it even comes up with the wrong possible genotypes. If you search for "punnett square calculator" you should be able to find one that works for you. Really you only need one of these also if you are doing somthing like 5 trait crosses and you get over 600 possilbe outcomes. usually only 16 or 32 genotypes in those 600 possibilities, but its better than writing out all those genotypes. or using a posterboard to make the square.
Which brings me to the more than 4 square punnett squares. say you take a spinner blast and cross it with a woma lesser. The Spinner Blast of course is Spider(Ss)xPinstripe(Pp)xPastel(Tt) the Woma Lesser would be Woma(Ww)xLesser(Ll). Because the Spinner Blast has no woma or lesser in it when writing out its genotype you would use the wildtype for those making its genotype SsPpTtWWLL, respectivly the Woma Lesser would be SSPPTTWwLl. Be sure to always put the same trait in the same spot or you will have unmatched letters for the results. i.e. SsPpTtWWLL x WwLlSSPPTT would give something like SWPlTSWPLT and that make no sence. But SsPpTtWWLL x SSPPTTWwLl = SsPPTtWwLL or a Woma Bumble Bee. punching this combo in to the calculator gives you 3.125% chance of getting anything from a Normal(SSPPTTWWLL)all wildtypes to a Woma Lesser Spinner Blast(SsPpTtWwLl)Heterozygous for all traits. 32 different combonations.
Using a rececive trait is as simple as using two lowercase letters in place of the heterozygous pair. just remember crossing anything that isn't het for a recessive trait, only gives you het for that trait. i.e. Spinner x Albino would be SsPpAA x SSPPaa that would give you Normals, Spiders, Pinstripes and Spinners, all het for albino.
I think that should cover it a bit for you. If you have any questions let me know. And if I made any mistakes someone please let me know.
Here is another page that I found that just goes over the punnett square and dihybrid crosses in a punnett square.
http://www.docfleetwood.net/wiki/tik...unnett+Squares
Reply With Quote