Suppose we consider a population in which a particular gene occurs in the form of two alleles, R (dominant) and r (recessive), in equal frequencies. Considering all of the sperms and ova of this population as a group provides us with a gene pool in which half of the gamates carry R and half carry r. (1) What would be the possible genetic constitutions (in regard to R and r) in the gametes produced by this population? (2) What would be the possible genetic constitutions (in regard to R and r) of the zygotes produced by random mating?
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.
Suppose we consider a population in which a particular gene occurs in the form of two alleles, R (dominant) and r (recessive), in equal frequencies. Considering all of the sperms and ova of this population as a group provides us with a gene pool in which half of the gamates carry R and half carry r.
(1) What would be the possible genetic constitutions (in regard to R and r) in the gametes produced by this population?
(2) What would be the possible genetic constitutions (in regard to R and r) of the zygotes produced by random mating?
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