Some types of crops have been genetically-engineered to resist certain types of diseases and pests. how might these genetically-engineered crops impact the environment?

Compare asexual reproduction to sexual reproduction

What came first egg or chicken? and is tomato a vegetable or a fruit?

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?