Some microorganisms, such as yeast, produce energy in oxygen-free environments through the process of a. mitosis. b. photosynthesis. c. aerobic respiration. d. anaerobic respiration.

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?