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4 cards from this section. Quick, good the night before a test.
Define Punnett Square in your own words.
Think of it as a way to predict traits.
What do the letters T and t represent in a Punnett Square for plant height?
Consider which is taller—T for tall or t for short.
What does a Punnett Square predict?
Focus on the purpose of the Punnett Square.
True or False: A phenotype can be influenced by both genotype and environmental factors.
Consider how traits might change with different growing conditions.
In a cross between two pea plants, one homozygous dominant for purple flowers (PP) and one heterozygous (Pp), what will be the phenotypic and genotypic ratios of the offspring?
Use a Punnett square to visualize the crosses.
A farmer has a pea plant that is heterozygous tall (Tt). He crosses it with a homozygous recessive short plant (tt). What fraction of their offspring will be short?
Set up the Punnett square to find out the fractions!
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