Topic: Chromosome theory, linkage and crossing over· Genetics and Evolution

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :

1. T.H. Morgan

2. Gregor J. Mendel

3. Alfred Sturtevant

4. Sutton Boveri

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Answer: 3. Alfred Sturtevant

Key idea: Alfred Sturtevant used recombination frequency as a measure of the distance between genes.

Morgan discovered linkage and recombination; Sturtevant, his student, used the frequency of recombination to map gene positions on a chromosome. Mendel proposed the laws of inheritance; Sutton and Boveri proposed the chromosomal theory.

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The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :

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