Introduction to Genetic Analysis 520

Introduction to Genetic Analysis 520 - 519 Problems 7. Is...

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Unformatted text preview: 519 Problems 7. Is it surprising that the progeny of cross 1 are wild- type phenotype? What does this outcome tell you? 8. Draw the chromosome 4 constitution of the male tester used in cross 2 and the gametes that he can produce. 9. With respect to chromosome 4, what gametes can the female parent in cross 2 produce in the absence of nondisjunction? Which would be common and which rare? 10. Draw first- and second-division meiotic nondisjunc- tion in the female parent of cross 2, as well as the resulting gametes. 11. Are any of the gametes from part 10 aneuploid? 12. Would you expect aneuploid gametes to give rise to viable progeny? Would these progeny be nullisomic, monosomic, disomic, or trisomic? 13. What progeny phenotypes would be produced by the various gametes considered in parts 9 and 10? 14. Consider the phenotypic ratio in the progeny of cross 3. Many genetic ratios are based on halves and quarters, but this ratio is based on thirds and sixths....
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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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