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Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by
T.H. Morgan established sex linkage and recombination in Drosophila, but it was his brilliant undergraduate student Alfred Sturtevant who first used recombination frequency to construct chromosome genetic maps!
Alfred Sturtevant (1913), a student of Thomas Hunt Morgan, reasoned that the frequency of recombination between two linked gene pairs is proportional to the physical distance separating them on the chromosome:
Key genetic milestones in NCERT include:
Sturtevant's genetic mapping principle served as the foundation for modern genome sequencing projects, including the Human Genome Project.
Diagnose every choice: Know exactly why the right option works and why distractors fail.
Hermann Henking discovered the nuclear structure termed the "X-body" (X-chromosome) during insect spermatogenesis, not gene maps.
Morgan discovered linkage and crossing over, but his student Sturtevant constructed the first genetic map.
Walter Sutton and Theodor Boveri proposed the Chromosomal Theory of Inheritance by correlating Mendelian factors with chromosome segregation.
Alfred Sturtevant utilized recombination frequency as a measure of genetic distance to map gene positions on chromosomes.
Because T.H. Morgan is the father of experimental genetics, students impulsively select Morgan without reading the specific mention of chromosome mapping.
"Alfred Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes and mapped their position on the chromosome."
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