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Creating Punnett Squares
By Cynthia Kirkeby
Sep 8, 2006, 18:15 PST

Punnett Squares

Learn about Punnet squares with the help of these helpful, interactive, and sometimes hysterical websites. It’s not every day that you get to figure out the genotypes of the purple people eater! Science is fun!

Figuring out genotype percentages with Punnett Squares makes the concept of biological traits much easier to understand, and once you get the hang of how to build them, you'll find that they're really easy. Even more importantly, you'll see how Punnett Squares help to make genetic combinations that seem complex at first glance, much easier to understand.

The Punnett Square Practice Page
This is a great page on Punnett Squares, even though the weird capitalization of the headings is very distracting. With that aside, you’ll find plenty of good practice problems, including my favorite, the Purple People Eater.
Source: Lubey’s BioHelp

Working Out Punnett Square Examples
Work out the probablities of monohybrid crosses and dihybrid crosses, then check your answers with this interactive quiz.
Source: Anthro Limited

Punnett Square Calculator
Input your genotypes and see what happens when they’re crossed. There are some already built into the pull-down menus or you can input your own variables.
Source: Chang Bioscience

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