Non-Mendelian Inheritance

When genes have more than just 2 versions (like blood type)

• polygenic inheritance

• multiple alleles

• codominance

• linked genes

• sex-linked traits

When several genes control one phenotype

• polygenic inheritance

• multiple alleles

• codominance

• linked genes

When there are 2 dominant alleles for the same gene

• polygenic inheritance

• multiple alleles

• codominance

• linked genes

• incomplete dominance

When two genes are located close together on the same chromosome so the traits tend to be inherited together.

• polygenic inheritance

• multiple alleles

• codominance

• linked genes

• incomplete dominance

When one allele isn't totally dominant over the recessive allele (heterozygous = an in-between phenotype)

• polygenic inheritance

• multiple alleles

• codominance

• linked genes

• incomplete dominance

Traits controlled by genes located on the X or Y chromosome

• polygenic inheritance

• multiple alleles

• sex-linked traits

• linked genes

• incomplete dominance

Examples include hemophilia, muscular dystrophy, and color blindness (affects mostly boys).

• polygenic inheritance

• multiple alleles

• sex-linked traits

• linked genes

• incomplete dominance

Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)

• polygenic inheritance

• multiple alleles

• sex-linked traits

• linked genes

• incomplete dominance

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Best human example is the ABO bloody type.

• polygenic inheritance

• multiple alleles

• sex-linked traits

• linked genes

• incomplete dominance

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Heterozygous shows 2 traits at the same time.

• codominance

• multiple alleles

• sex-linked traits

• linked genes

• incomplete dominance