Complex Traits

Front 1

Discontinuous variation

Back 1

traits controlled by a single gene and represented by two or three alleles, and ordinarily the phenotypes are distinct classes e.g. yellow/green pea pods

Front 2

Continuous variation

Back 2

Traits with many variations that varies in a smooth fashion between the extremes. Are controlled my more than one gene

Front 3

Polygenic

Back 3

controlled by more than one gene (continuous traits)

Front 4

Multifactorial

Back 4

a hereditary pattern seen when there is more than one genetic factor involved and, sometimes, environmental factors
EX skin color

Front 5

Complex Trait

Back 5

a hereditary pattern seen when there are multiple genes and multiple environmental factors; it is also a continuous (smooth) distribution of phenotypes

Front 6

Additive Model of polygenic Inheritance

Back 6

1) traits are qualified by the degree of the characteristic expressed
2) phenotypic exppression varies and is best analyzed in populations
3) traits are controlled by 2+ genes
4) are inherited in a standard Mendelian pattern - with independent assortment
5) the effect of each active allele is small
6)
7)
8)

Front 7

"gedunkon"

Back 7

thought experiment