In a population of a beetle species, you notice that thereis a 3:1 ratio of shiny to dull wing covers. Does this ratioprove that the shiny allele is dominant? (Assume thatthe two states are caused by two alleles of one gene.) Ifnot, what does it prove? How would you elucidate thesituation?
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.
In a population of a beetle species, you notice that there
is a 3:1 ratio of shiny to dull wing covers. Does this ratio
prove that the shiny allele is dominant? (Assume that
the two states are caused by two alleles of one gene.) If
not, what does it prove? How would you elucidate the
situation?
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