Passage II
Plants from Species X can be tall or short, and they can have red, pink, or white flowers. Height in Species X plants is controlled by Gene T, which has 2 alleles, T and t. Flower color in Species X plants is controlled by Gene R, which also has 2 alleles, R and r. To determine how height and flower color are inherited in Species X, a student conducted the following crosses.
Cross 1
Two tall Species X plants, each with the genotype Tt, were crossed. The numbers and phenotypes of the resulting offspring are shown in Table 1.
Cross 2
Two pink-flowered Species X plants, each with the genotype Rr, were crossed, and the numbers and phenotypes of the resulting offspring are shown in Table 2.
Cross 3
Two Species X plants, each with the genotype TtRr, were crossed. The numbers, genotypes, and phenotypes of the resulting offspring are shown in Table 3.
7. What was the genotype for Gene T in the offspring from Cross 2 ?
Your Answer is
Correct Answer is D
Explanation
Gene T determines the height, but only the genotype Rr of the parent is listed in Cross 2, while Gene R thinks of the flower color, there is no information related to height and Gene, and the type of the offspring Gene T cannot be determined