In polygenic traits when the bell curve distribution of traits moves to one end of the curve because of a preference for best fit of that trait. What's this shift called?

How are viruses and bacteria different?

Building glycogen from glucose molecules is an example of what

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?