Heredity is defined as

• : The passing on of physical or mental characteristics genetically from one generation to another.
• Dotz: Heredity is when parents pass their genetic traits to their offspring through asexual or sexual reproduction. For instance, if you are wondering why you look like one or both of your parents, then heredity is the answer. Some examples of the traits that are passed on include eye color, height, hair color, etc. 
  
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                           - Dotz