Which describes the notation of Tt for the trait of being tall

What would be an example of hypothesis for goldfish respiration lab

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

About __ of the mass of the cell is water