User:Melissahwong/sandbox

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This article was the subject of an educational assignment in 2014 Q3. Further details were available on the "Education Program:University of Western Ontario/Advanced Genetics (Fall 2014)" page, which is now unavailable on the wiki.

Additive genetic effects (currently a very short stub with no citations)

I haven't started researching articles on it yet, but I learned about it in Evolutionary Genetics last year so I have an idea of what I can add to it and where to start.

Additive Genetic Effects

Additive genetic effects are when alleles from different loci, called additive alleles, contribute to the quantitative trait (see quantitative genetics) of an individual such that the phenotype is equal to the sum of the effects of individual alleles, or proportional to the number of alleles^[1]. The additive genetic effect of an allele is an estimate of the quantitative change in a trait that is associated with substituting one allele (one genotype) with that of another allele within an interbreeding population (this sentence is from the original stub).

Types of Additive Traits

Here I will talk about continuous additive traits, such as height that can be measured on a continuous scale, and meristic additive traits, which are discrete "counts" such as number of leaves.

Calculation of Additive Effects

Here I will paste the rest of the stub, talking about how additive effects are calculated from test crosses. It gives an example for how the additive effect of a trait controlled by one locus with two alleles is calculated, so I will see if I can find how more comlex traits are calculated if they are not too complicated for me to understand and for the purposes of this project.

Heritability and Additive Alleles

Here I will talk about heritable variation, and how a trait must be additive to be heritable.

References

^ MedicineNet. Definition of Additive Genetic Effects. Last updated June 14, 2012. Retrieved November 1, 2014 from http://www.medicinenet.com/script/main/art.asp?articlekey=25508

[1] MedicineNet. Definition of Additive Genetic Effects. Last updated June 14, 2012. Retrieved November 1, 2014 from http://www.medicinenet.com/script/main/art.asp?articlekey=25508

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