Biology a benchmark usa test prep need

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?

In each transformation of energy , some energy what?

What is the role of dna ligase in the elongation of the lagging strand during dna replication?