1 Superficial MRSA skin infections include pimples, boils, and impetigo. 2  Impetigo is a superficial skin infection that often has a crusty and/or blistered appearance. 3  If left untreated, superficial infections have potential to progress into serious/invasive infections. If left untreated, superficial infections have potential to progress into serious/invasive infections. 2  Deep MRSA skin infections include abscesses and cellulitis. 3  Both of these present as painful, red, swollen areas of skin.
Home Â» Polygenic inheritance. Definition. noun. A non-Mendelian form of inheritance in which a particular trait is produced by the interaction of many genes. Supplement.
Polygenic inheritance occurs when traits are controlled by more than one gene. In fact, the name polygenic literally translates to 'many genes.'. Let's look at height as an example of this. We will assume height is determined by four different gene pairs, each made up of two alleles. Each allele is represented by a letter, and uppercase letters represent dominant alleles for height.