In the f2 generation of mendel’s crosses, a. all plants had the dominant trait. b. half of the plants had the dominant allelec. all plants had both the dominant and recessive alleles. d.one in four plants had two alleles for the recessive trait.

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?