1
answer
0
watching
822
views
7 Jan 2019
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.
1. Suppose that the dominant alleles specify functional enzymes, and the recessive alleles are nonfunctional. Propose a biochemical pathway that could explain the gene interactions.
2. 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?
3. Assuming that wild-type zucchini are green, how would you describe the phenomenon that occurred in the F1 of part (2)?
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.
1. Suppose that the dominant alleles specify functional enzymes, and the recessive alleles are nonfunctional. Propose a biochemical pathway that could explain the gene interactions.
2. 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?
3. Assuming that wild-type zucchini are green, how would you describe the phenomenon that occurred in the F1 of part (2)?
Lelia LubowitzLv2
10 Jan 2019
