All insect has three main body parts. The head is the part of the insect that contains the brain and the two compound eyes. The two antennae are attached to the head. The thorax is the body section between the head and the abdomen. This section operates the wings and legs. The legs attach to the thorax.
The collection of all the genes and the various alternate or allelic forms of those genes within a population is called its gene pool. Genetic variation within a population is measured according to the number of different alleles of all genes and the frequency with which they appear. Variation is high when there are many different allelic forms of all genes and when there are many different combinations of those alleles.
The focus is the population or the species-not the individual. Electron micrograph of a natural bacterial population, showing a range of size and morphology. The collection of all the alleles of all of the genes found within a freely interbreeding population is known as the gene pool of the population. Each member of the population receives its alleles from other members of the gene pool (its parents) and passes them on to other members of the gene pool (its offspring).