A breeder crossed true-breeding T/T R/R plants with true-breeding t/t r/r plants to generate heterozygous F1 plants. When backcrossing these F1 plants as female parents to the homozygous recessive strain as a male (pollen) parent, the breeder noticed that one F1 plant gave unexpected results. There were only half as many kernels as usual on the corn cobs, and the phenotypes of plants grown from those kernels indicated they had the following genotypes in the numbers indicated below. Genotype     #

T/t R/r           98

t/t r/r            104

T/t r/r           3

t/t R/r           5

Briefly describe the chromosomes bearing these two genes in the unusual F1 plant.

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Parental cross TTRR X ttrr F1 progeny TtRr Test cross TtRr X ttrr Expected progeny 1 TtRr 1 Tt... View the full answer