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AIPMTAIPMT 2015Principles of Inheritance and Variation
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Genes are the units of inheritance and contain the information that is required to express a particular trait in an organism. Alternating forms of a single gene which code for a pair of contrasting traits are known as alleles. For example, two alleles determine the height of pea plant (tall and dwarf). Principles of Inheritance and Variation 343 hape-Round (R)-Wrinkled (r)