Principles of Heredity

• Principles of Reproduction


  -          ‘like begets like’

  -          human individuals will reproduce their own kind
• Principle of Variation


  -          no individuals are exactly alike
• Principle of Dominance and Recessiveness


  -          determines the presence of similarities and differences among family members
• Principle of Chance


  -          chance plays a significant role in making absolute prediction almost possible

  -          ‘chance’ within the limits of potential traits transmissible by heredity
• Principle of Sex-Linked Characteristics


  -          these sex linked traits are carried by the same genes that determine sex

  -          sex linked traits are carried by women, but suffered by most men

  -          baldness, color blindness, and hemophilia are sex-linked characteristics