If a population of 1,000 individuals has 160 rr genotypes, assuming simple dominance by the a allele, what is the frequency of the dominant phenotype in the population?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?