In dolphins, gray (G) is dominant to black (g), Sleek (S) is dominant to pudgy (s) and friendly (F) is dominant to mean (f). All

mRNA functions as the messenger that conveys DNA's instructions to ribosomes, which are responsible for protein synthesis. Meanwhile, tRNA aids in transporting the requisite amino acids to the ribosomes. Essentially, mRNA specifies the amino acids required and their sequence, while tRNA collects these amino acids and delivers them to the ribosomes.

Aspects to include:

• an investigative question framed as “What is the impact of X on Y?”
• an independent variable being immunity
• a dependent variable concerning the spread of disease
• the rate at which disease spreads (not merely the spread itself)