If a population has only one allele form of the gene, every individual is: select one:

It is the Gene Pool. It is an accumulation of the considerable number of qualities in a populace. This can be any populace - frogs in a lake, trees in a timberland, or individuals in a town. A quality pool isn't a genuine place; it's a unique thought or a fanciful gathering.

A dichotomous key helps us classify organisms using their physical characteristics by dividing the organisms in to groups. For example, organisms with 6 legs, organisms with 8 legs and organisms with more than 8 legs are all grouped into different categories. These categories may further be divided into more categories; for example, the on the basis of the organisms' mode of respiration or on the basis of the organisms' body structures.
The groupings help in identification, separation and classification of organisms.