A species of aphid normally breeds and lays its eggs on the new growth of a plant in the month of May. A mutant female grasshopper in the population produces a batch of eggs that carry a new allele that delays sexual development until July. Her offspring feed on the new growth of a different plant that grows later in the season in the same area. Her offspring mate successfully with one another, producing a new generation of July-mating aphids. This new form is a potential candidate for:
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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