Other Patterns of Inheritance. Mendel’s Laws of Inheritance 1.The Law of Segregation 2.The Law of Independent Assortment 3.The Law of Dominance.

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Presentation transcript:

Other Patterns of Inheritance

Mendel’s Laws of Inheritance 1.The Law of Segregation 2.The Law of Independent Assortment 3.The Law of Dominance

Exceptions to Every Rule… Not all phenotypes can be explained by Mendel’s Laws. Examples of some phenotypes:

Incomplete Dominance Allele is neither completely dominant or recessive Heterozygote phenotype lies between dominant and recessive.

Codominance Heterozygous phenotype expresses both dominant and recessive traits.

Multiple Alleles Genes that have more than two different alleles. In humans, blood type has three different alleles to make four different phenotypes

Polygenic Traits Poly = many Genic = genes A trait that is produced by the interaction of two or more genes