Complete a cross between two organisms with the genotype ttyy. list all genotypes. how many phenotypes will be produced? what is the probability of producing an offspring with a homozygous recessive genotype

In "the pig," what is the main effect that the piglet initially has on kibuka?

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.

This is a biological reaction due to a stimulus. i need this quickly !