You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who proposed the coupling and repulsion theory of linkage?" whose answer is Alfred Sturtevant.
Each document should contain about 30 words, and these documents should contain useful information.

Query: coupling and repulsion theory of linkage history
Useful Output:

Doc 1: Coupling and Repulsion hypothesis of linkage: by Bateson and Punnett •Bateson and Punnett in 1906 described a cross in sweat pea (Latharus
Doc 2: This is Repulsion. • Linked genes are of 2 types: • Complete linkage: genes for 2 or more characters appear together for two or more generations
Doc 3:  Theory of Heredity : https://youtu.be/7ss1kXtofQ0 ✓ Comparison between Gene and Chromosome behavior : https://youtu.be/EX-_xWsp8xc ✓ Linkage
Doc 4: LINKAGE (COUPLING) - TAMIL EXPLANATION. BIOLOGY TAMIL நடை•9.5K  The Hollow Moon Theory: What NASA Isn't Telling Us. The Mysteria
Doc 5: Coupling & Repulsion in Linkage (Genetics). 8.2K views · 1 year  The 9 Powerful Mental Models Used By History's Greatest Minds. Dante