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Principles of Inheritance and Variation

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  1. Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parent of coupling type alongwith its cross repulsion
    1. Coupling AABB, aabb; Repulsion AABB, AAbb
    2. Coupling AAbb, aaBB; Repulsion AaBb, aabb
    3. Coupling aaBB, aabb; Repulsion AABB, aabb
    4. Coupling AABB, aabb: Repulsion AAbb, aaBB
Correct Option: D

Bateson and Punnett (1906) discovered coupling and repulsion in sweet pea (Lathyrus odoratus).


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