Students find one pro drug website and one anti drug website, how do they compare

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

Monitor and apply fix up stratorgies

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?