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Dihybrid Punnett Squares

Dihybrid Punnett Squares. Steps. 1. Identify the parents genotypes. Ex. heterozygous tall, homozygous red flowers. TtRR 2. Use FOIL to get gamete (sex cell) possiblities. Ex. TR or tR 3. Short cut…how many boxes for the punnett square depends on how many possible gametes…. Example.

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Dihybrid Punnett Squares

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  1. Dihybrid Punnett Squares

  2. Steps • 1. Identify the parents genotypes. Ex. heterozygous tall, homozygous red flowers. TtRR 2. Use FOIL to get gamete (sex cell) possiblities. Ex. TR or tR 3. Short cut…how many boxes for the punnett square depends on how many possible gametes….

  3. Example • TtRR x TtRr • P1: TR, tR • P2: TR, Tr, tR, tr TR Tr tR tr TR tR

  4. Phenotypic ratios • How many??? Tall and Red: Tall and White: Short and Red: Short and White:

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