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Unformatted text preview: 145 Problems 22. In the tiny model plant Arabidopsis, the recessive al- lele hyg confers seed resistance to the drug hy- gromycin, and her, a recessive allele of a different gene, confers seed resistance to herbicide. A plant that was homozygous hyg / hyg her / her was crossed to wild type, and the F 1 was selfed. Seeds resulting from the F 1 self were placed on petri dishes contain- ing hygromycin and herbicide. a. If the two genes are unlinked, what percentage of seeds are expected to grow? b. In fact, 13 percent of the seeds grew. Does this percentage support the hypothesis of no linkage? Explain. If not, calculate the number of map units between the loci. c. Under your hypothesis, if the F 1 is testcrossed, what proportion of seeds will grow on the medium containing hygromycin and herbicide? 23. In the pedigree in Figure 4-17, calculate the Lod score for a recombinant frequency of 34 percent....
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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.
- Spring '08