One unit of platelets raises the platelet count which amount

Me with these questions if you’re it sure don’t answer

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

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?