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Predicting Genotypes and Phenotypes

Predicting Genotypes and Phenotypes. Punnett Squares. -used to predict genotypes and phenotypes of offspring based on the parents genotype. Punnett Squares. Monohybrid crosses- 1 heterozygous trait is crossed (Bb X Bb) Dihybrid crosses- 2 heterozygous traits are crossed (BbSs X BbSs).

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Predicting Genotypes and Phenotypes

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  1. Predicting Genotypes and Phenotypes

  2. Punnett Squares -used to predict genotypes and phenotypes of offspring based on the parents genotype

  3. Punnett Squares Monohybrid crosses- 1 heterozygous trait is crossed (Bb X Bb) Dihybrid crosses- 2 heterozygous traits are crossed (BbSs X BbSs)

  4. Punnett Squares (parent generation) Eye Color mom BB B B b dad bb b Bb Bb Bb Bb Genotypic Ratio Phenotypic Ratio

  5. Punnett Squares (F1) Eye Color mom Bb B b B dad Bb b BB Bb Bb bb Genotypic Ratio? Phenotypic Ratio?

  6. Punnett Squares Eye Color and Height mom BbSs BS Bs bS bs BS Dad BbSs Bs bS bs BbSS BBSs BbSs BBSS BBSs BBss BbSs Bbss bbSS bbSs BbSS BbSs BbSs Bbss bbss bbSs Genotypic Ratio? Phenotypic Ratio?

  7. Laws of Probability • Used to predict genotype or phenotype • -Multiplication rule-to determine the probability of different events happening in combination, multiply the probability of each event. • -Addition rule-to determine the probability of the same events happening add the probability of even event. • See examples

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