In order for an inherited genetic mutation to result in a phenotypic change for a recessive trait, which of the following must occur? the mutation must be inherited from the father. the mutation must be inherited from the mother. the mutation must be inherited on the x chromosome. the mutation must be inherited by both parents.

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.