exam 2 review - 1. You are examining the inheritance of...

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1. You are examining the inheritance of four different mutations in a newly discovered rat species. Through selective breeding, it is possible to create four true-breeding strains, normal in phenotype except for the presence of one mutation. Each strain is homozygous for one of the mutations. You also have access to a true-breeding wild-strain. Determine which type of inheritance (autosomal, sex-linked, maternal effect, or cytoplasmic) best explains the inheritance patterns of each trait. Assume that for nuclear genes, only recessive mutations are involved, only female patterns contribute cytoplasm to the offspring, the male is the heterogametic sex and matings are within each group. Phenotypes from each cross are listed below: Mutation I: Eye Color Cross Reciprocal Female male female male P red wt wt red F1 wt red wt wt F2 ½ wt ½ wt wt ½ wt ½ red ½ red ½ red Mutation II: Fur Cross Reciprocal Female male female male P fluffy wt wt fluffy F1 fluffy fluffy wt wt F2 wt wt wt wt Mutation III: Legs
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This note was uploaded on 12/12/2010 for the course BIOL 305 taught by Professor Zhang during the Fall '10 term at University of Michigan.

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exam 2 review - 1. You are examining the inheritance of...

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