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What is not part of the physical characteristics of an organism?

  1. Hair color

  2. Body temperature

  3. Dominant allele

  4. Height

The correct answer is: Dominant allele

Dominant allele is not part of the physical characteristics of an organism because it is a genetic trait and not something that can be observed or measured on an organism's body. Hair color, body temperature, and height are all directly related to the physical appearance or attributes of an organism. However, dominant allele is a type of genetics concept that does not physically manifest itself on an organism's body. Therefore, it is not considered a physical characteristic.