What do you call the Opening(s) in your instrument that help Project Sound?

Which principle of design is in primary use in this structure?

Afruit fly is heterozygous for both eye color and wing length (eeww). e is dominant for yellow eyes. e is recessive for white eyes. w is dominant for long wings. w is recessive for short wings. what would most likely be the distribution of phenotypes that this fruit fly could pass on in its gametes?

Joke-- what is the best way to save money?