Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 3, Problem 23P
You perform a cross between two true-breeding strains of zucchini. One has green fruit and the other has yellow fruit. The F1 plants are all green, but when these are crossed, the F2 plants consist of 9 green : 7 yellow.
| a. | Explain this result. What were the genotypes of the two parental strains? |
| b. | Indicate the |
| c. | Describe the epistasis interactions observed. |
| d. | Suppose that the dominant alleles specify functional enzymes, and the recessive alleles are nonfunctional. Propose a biochemical pathway that could explain the gene interactions |
| e. | Is it possible to cross two different pure-breeding yellow zucchini strains and obtain all green progeny? What would be the genotypes of the parents and progeny? |
| f. | Assuming that wild-type zucchini are green, how would you describe the phenomenon that occurred in the F1 of part (e)? |
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Chapter 3 Solutions
Genetics: From Genes to Genomes
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