Introduction to Genetic Analysis 65

Introduction to Genetic Analysis 65 - 44200_02_p27-72...

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64 Chapter 2 Patterns of Inheritance dizygotic (two-egg) twins, what is the probability that both the twins will have the same phenotype for pigmentation? 11. The plant blue-eyed Mary grows on Vancouver Is- land and on the lower mainland of British Colum- bia. The populations are dimorphic for purple blotches on the leaves—some plants have blotches and others don’t. Near Nanaimo, one plant in na- ture had blotched leaves. This plant, which had not yet flowered, was dug up and taken to a laboratory, where it was allowed to self. Seeds were collected and grown into progeny. One randomly selected (but typical) leaf from each of the progeny is shown in the accompanying illustration. a. Formulate a concise genetic hypothesis to ex- plain these results. Explain all symbols and show all genotypic classes (and the genotype of the original plant). b. How would you test your hypothesis? Be specific. 12. Can it ever be proved that an animal is not a carrier of a recessive allele (that is, not a heterozygote for a given gene)? Explain.
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This note was uploaded on 01/10/2011 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.

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