Coupling and repulsion are the two faces of

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(B) Coupling (cis-arrangement) and repulsion (trans-arrangement) are two aspects of linkage. Linkage is the physical association of genes on the same

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Linkage

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(B) Coupling (cis-arrangement) and repulsion (trans-arrangement) are two aspects of linkage. Linkage is the physical association of genes on the same chromosome. When dominant alleles of two genes are present on the same chromosome,it is called coupling. When a dominant allele of one gene and a recessive allele of another gene are present on the same chromosome,it is called repulsion.

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