Genetics_Practice_Probs - Practice Problems: 1) Generate a...

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Practice Problems A33 Practice Problems: 1) Generate a Punnett Square for a heterozygous individual (a+/a) crossed with a heterozygous individual (a+/a). In this case the mutation is recessive. Determine the genotypic ratio and phenotypic ratio. For phenotypic ratio do not refer to specific a+ or a phenotype but instead refer to them as dominant or recessive. Can this trait be sex linked in humans? 2) Generate a Punnett Square for a heterozygous individual crossed with a heterozygous individual. Make the mutation dominant. Notice that the phenotypic ratio for dominant/recessive is identical to 1 (3/4 Dominant, 1/4 recessive) except you now have to realize your mutation is Dominant and wild type is recessive. 3) Generate a Punnett Square for a heterozygous individual crossed with a homozygous recessive individual. Make the mutation dominant. Determine the genotypic ratio and phenotypic ratio. Can this trait be sex linked in humans? 4) Generate a Punnett Square for a heterozygous individual crossed with a homozygous dominant individual. Make the mutation dominant. Determine the genotypic ratio and phenotypic ratio. Can this trait be sex linked in humans? How does your answer compare to 3? Your answer for phenotypic ratios for Dominant/recessive should be identical but in this case the mutation is the Dominant phenotype. 5) Generate a Punnett Square for a homozygous recessive individual crossed with a homozygous recessive individual. Determine the genotypic ratio and phenotypic ratio. Can this trait be sex linked in humans? How does your answer compare to 3? 6) Generate a Punnett Square for a homozygous dominant individual crossed with a homozygous dominant individual. Determine the genotypic ratio and phenotypic ratio. Can this trait be sex linked in humans? How does your answer compare to 5? 7) Generate a Punnett Square for a homozygous dominant individual crossed with a homozygous recessive individual. Determine the genotypic ratio and phenotypic ratio. Can this trait be sex linked in humans?
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This note was uploaded on 08/01/2008 for the course BIO 1A taught by Professor Schlissel during the Spring '08 term at University of California, Berkeley.

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Genetics_Practice_Probs - Practice Problems: 1) Generate a...

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