A monohybrid cross involves the crossing of individuals and the examination of a single character (for example, flower color) in their offspring. The Punnett square is a useful tool for predicting the genotypes and phenotypes of offspring in a genetic cross involving a Mendelian trait. Watch the following video to learn how to construct a Punnett square.
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This video (from Ricochet Science) reviews the basics of monohybrid crosses:
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