Natural Selection and

Sources of Genetic Variation

By: Patricia Clariza Santos MLS 1D

Natural Selection

Sources of Genetic Variations

Natural Selection – means that individuals that are the best adapted to their environment have the greatest chance of surviving and successfully reproducing.

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Sources of Genetic Variation a. STABILIZING

SELECTION- Individual’s with extreme phenotypes which tall and short plants are eliminated.

b. DIRECTIONAL SELECTION- Individual’s with one extreme phenotypes in this case the short plants are eliminated.

c. DIVERSIFYING SELECTION- Individual’s with intermediate phenotypes which plants of medium heights are eliminated.