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.
By the end of this tutorial you should have a working understanding of: 1  The application of Punnett squares for monohybrid and dihybrid crosses. 2  Why test crosses are used to determine some genotypes. 3  Basic probability theory.  When to apply the Rule of Multiplication and the Rule of Addition.