Which of the following organisms is a prokaryote? agaricus arvensis, horse mushroom rhizopus stolonifer, bread mold fungus saccharomyces cerevisiae, baker’s yeast thiopedia rosea, purple sulfur bacterium

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

Why has two different alleles for the same trait?

What kinds of molecules can pass through the cell membrane without any problem?