One plant produced sesquiterpene, (E)‐β‐farnesene (EBF), has been considered a potential defense against aphids, since its emission by plants causes aphids to drop off the plant or depart from the feeding site. 

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Crosses for stem and leaf color in four-o’clocks illustrate cytoplasmic 

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Leber hereditary optic neuropathy (LHON) - People who have this disorder experience rapid loss of vision in both eyes, which results from the death of cells in the optic nerve.

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Cytoplasmic male sterility

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Linkage 

Tendency of two or more than two gene remain together during the course of inheritance.

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Coupling and Repulsion

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Type of Linkage 

Genes located close together on the same chromosome are called linked genes

Incomplete linkage, intermediate between the two extremes of independent assortment and complete linkage. 

ndependent assortment