BIOL 151 Lecture Notes - Lecture 16: Blending Inheritance, Punnett Square, Pea
Document Summary
Early theories of heredity predicted the transmission of acquired characteristics: trait: a characteristic, the theory of inheritance of acquired characteristics cannot account for: Traits such as hair color can be inherited, but it is difficult to see how hair. A nonliving tissue could send substances to the reproductive organs. Traits that are not yet present in an individual can be transmitted to the offspring. Parts of the body that are lost as a result of surgery or accident are not missing in the offspring. Belief in blending inheritance discouraged studies of hereditary transmission: blending inheritance: the traits in the offspring resemble the average of those in the parents. The idea of blending inheritance which implies the blending of the genetic material as a general rule presents problems. It cannot explain the reappearance of a trait several generations after it apparently disappeared in a family.
