Color blindness is an x-linked recessive trait. under what conditions can an unaffected male have a color-blind daughter? his mate is color-blind. he can't. he is heterozygous for color vision. his father is color-blind. his mother is color-blind.

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.