NonMendelian Genetics

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Presentation transcript:

NonMendelian Genetics

Incomplete Dominance If individuals display a trait that is intermediate between the two parents, the pattern of inheritance is called incomplete dominance

Incomplete Dominance

Codominance If two alleles are expressed at the same time, the pattern of inheritance is called codominance.

Codominance

Multiple Alleles Multiple alleles is a condition in which more than two alleles exist for a trait.

Multiple Alleles

Polygenic Traits Traits that are controlled by two or more genes.

Polygenic Traits

Sex-Linked Genes Sex linkage is the situation in which the gene for the trait is carried on only the X (23rd) chromosome. Therefore, a man (XY) would only have one gene for this trait, but a woman (XX) would have two genes for the trait since she has two X chromosomes (homologous pair #23).

Sex-Linked Genes