AP BIOLOGY

Detailed explanation-1: -Thomas Hunt Morgan was the first person to discover linkage in Drosophila. Morgan went through several dihybrid crosses in Drosophila for the study of sex-linked genes.

Detailed explanation-2: -Hint: The term linkage was coined by TH Morgan, who carried out several dihybrid crosses in Drosophila. With this, he was able to study genes that were sex-linked. He also described the physical association of genes on a chromosome.

Detailed explanation-3: -Linkage was discovered by Bateson and Punnett in sweet pea (Lathyrus odoratus).

Detailed explanation-4: -Thomas Hunt Morgan and his legacy. Thomas Hunt Morgan was awarded the Nobel Prize in Physiology or Medicine in 1933. The work for which the prize was awarded was completed over a 17-year period at Columbia University, commencing in 1910 with his discovery of the white-eyed mutation in the fruit fly, Drosophila.

Detailed explanation-5: -In January 1910, a century ago, Thomas Hunt Morgan discovered his first Drosophila mutant, a white-eyed male (Morgan 1910). Morgan named the mutant gene white and soon demonstrated that it resided on the X chromosome. This was the first localization of a specific gene to a particular chromosome.