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Punnett Squares

Punnett Squares

Description:

Students will learn how to make a Punnett square to predict the probabilities of resulting genotypes and phenotypes of offspring. 

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Tutorial

Source: Chris McCarter created with Camtasia

Terms to know from this video:

probability

gamete

segregation in meiosis

allele

genotype

phenotype

*Additional:  The male gametes of plants are "pollen" and not sperm.  They do not have tails/flagella.  The image used in the video was to easier distinguish one parent from the other.

Can you answer these?

1.  What would be all the resulting genotypes of the offspring resulting in a cross between one homozygous tall (dominant) pea plant and one heterozygous tall pea plant?

 

2.  Is it possible to have a heterozygous short pea plant?  Explain.