There is a greater variety of genotypes that the next generation can have. The new generation obtains genes with the genotype of Tr from the 1st plant, and obtains genes witht the genotype of TR, tR, Tr, or tr from the 2nd plant. Ttrr Ttrr Dihybrid crosses can get trickier, though, when the next generation can recieve a combination of TR, Tr, tR, or tr from the first plant and the second plant. Selective Breeding Forever people have wanted the best plants or animals of a species. One method of obtaining this, is called selective breeding .
Selective breeding is the method of breeding certain organisms together that have desirable traits.
Hopefully their offspring will inherit these desirable traits. For centuries it has been used to obtain desirable plants and animals. A recent selective breeding project on plants involved the work of Dr. Jerry Parsons, an Agricultural Specialist of Bexar County, Texas, United States. He began a project in 1984 to grow red bluebonnets. After searching, he found a rare patch of pink bluebonnets in Bexar County, Texas.