What is the function of tRNA?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

In a certain plant, yellow leaves are dominant (y) and red leaves are recessive (y). a plant with genotype yy and a plant with yy are crossed. if they have four offspring, how many would you predict would have red leaves? a: 1b: 0c: 3d: 2