MathBench > Probability

More Mice with Fangs: Intermediate Punnett Squares


In the module on probability we talked about Laws of Probability that can be applied to, well, just about anything -- rolling dice or determining the probability of survival, or playing the stock market, or genetics, to name a few. In this module, we're going to talk about another approach to probability, which is much more specific to genetics, called Punnett Squares. Punnett Squares were invented by one Reginald Punnett, a British geneticist who also studied ribbon worms and played cricket with G. H. Hardy of Hardy-Weinberg fame, one of the true big cheeses in the genetics world.

In this module, you'll see how Punnett Squares are really just a graphical way of reproducing the basic rules of probability.

You'll also see how to predict the phenotypic outcome from a variety of multi-loci genotypic crosses -- in other words, how to predict what the kids will look like.

Clipart for this module thanks to Arthur's Clipart,, Clipart Heaven