Introduction to Genetic Analysis 227

Introduction to Genetic Analysis 227 - 44200_06_p185-226...

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1234 567891 0 1 1 1 2 1w ±±± w ±±±±± ±± 2w ± w ± w ± w 3w w ±±±±±± 4w 5w 6w ± w ± w 7w ww 8w ± w 9w 10 w 11 w w 12 w a. Explain what this experiment was designed to test. b. Use this reasoning to assign genotypes to all 12 mutants. c. Explain why the F 1 hybrids between mutants 1 and 2 had a different phenotype from that of the hybrids between mutants 1 and 5. 67. A geneticist working on a haploid fungus makes a cross between two slow-growing mutants call mossy and spider (referring to abnormal appearance of the colonies). Tetrads from the cross are of three types Spore A B C 1 wild type wild type spider 2 wild type spider spider 3 no germination mossy mossy 4 no germination no germination mossy (A, B, C), but two of them contain spores that do not germinate. Devise a model to explain these genetic results, and propose a molecular basis for your model. 226 Chapter 6 From Gene to Phenotype
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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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