Pre-Parturient Mare Behavior. Mares will generally foal after an 11-month gestation, but this is highly variable. Studies have shown a range of gestation from 315 to 387 days, with an average of about 341 days.
Punnett squares are most commonly used to examine genotype probabilities from one genetic locus at a time. They can be used to look at more than one locus at time, but some find the resulting diagrams complicated and difficult to interpret.
Not to burst your bubble Chris, but the TS-2 do go out of square occasionally. I am not really certain why, I think it probably depends on the dryness of the wood that is used and climate that the square has lived in over the years. Re-squaring is tedious, but definitely do-able.