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Write a brief account of the type of linkages.

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There are four types of linkages present : 

1. Complete Linkage - Linkage in which crossing over does not occur is known as complete linkage or absolute linkage.

2. Incomplete Linkage  - If some frequency of crossing over also occurs between linked genes, it is known as incomplete linkage. 

3. Coupling Linkage - It refers to linkage either between dominant genes or between recessive genes.

4.Repulsion Linkage - It refers to the linkage of some dominant genes with some recessive genes.

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Ritika Jonwal

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