Genetic variation is stored in a populationâs gene poolâthe combined. alleles of all of the individuals in a population. Different combinations of. alleles in a gene pool can be formed when organisms mate and have offspring. Each allele exists at a certain rate, or frequency.
Also found in: Wikipedia. cosÂ·tal surÂ·face. the surface of certain structures that face the ribs; they are the costal surfaces of the lungs (facies costalis pulmonis [TA]) and the scapula (facies costalis scapulae [TA]).
The folds in the inner membrane of the mitochondria are called cristae. They serve to provide a greater surface area for the proton-pump through which protons pass down their â¦ concentration gradient through ATP synthase to produce ATP in cellular respiration.1 person found this useful.he folds in the inner membrane of the mitochondria are called cristae. They serve to provide a greater surface area for the proton-pump through which protons pass down their â¦ concentration gradient through ATP synthase to produce ATP in cellular respiration. 1 person found this useful.