Yellow-seeded plants might be homozygous or heterozygous.We could find out which by crossing these plants with
A)true breeding yellow-seeded plants.
B)true breeding green-seeded plants.
C)heterozygous yellow-seeded plants.
D)true breeding white-flowered plants.
E)true breeding purple-flowered plants.

Question

Quizplus · Accepted Answer

Crossing yellow-seeded plants with true breeding green-seeded plants would reveal whether the yellow-seeded plants are homozygous (if all offspring have yellow seeds) or heterozygous (if some offspring have green seeds). Crossing with true breeding yellow-seeded plants (choice A) would not give us any new information because these plants are already yellow-seeded and could be homozygous or heterozygous. The same is true for crossing with heterozygous yellow-seeded plants (choice C), as their offspring could be yellow or green seeds, but we wouldn't know if the original yellow-seeded plant was homozygous or heterozygous. True breeding white-flowered plants (choice D) and purple-flowered plants (choice E) are irrelevant to seed color and would not provide any useful information.

Yellow-Seeded Plants Might Be Homozygous or Heterozygous