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Unformatted text preview: gametes b. Punnett square- each parent (Bb) on each side, and the squares result in F2 generation. BB+ bb= 3:1 [punnett square] RATIOS CALLED 3:1 monohybrid F2 phenotypic ratios. B b B BB Bb B Bb bb E. Phenotype of an individual does not always reveal its genotype = can be heterozygous, homozygous a. Genetic constitution, expressed by symbols, is its genotype i. Ex. BB= genotype: homozygous dominant, phenotype black ii. Ex. Bb= genotype: homozygous recessive, phenotype brown iii. Ex. F1 offspring= genotype: heterozygous Bb, phenotype: black F. A test cross can detect heterozygosity...
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- Fall '09
- Punnett square, bb bb, Bb b bb