Codominance The expression of both alleles

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Presentation transcript:

Codominance The expression of both alleles Neither one of the alleles are dominant or recessive, and is expressed in the offspring. Ex. - In some chickens, alleles for feather color are codominant.

Codominance Alleles are written with superscripts. Genotype = FB FB Phenotype = Black Genotype = Fw Fw Phenotype = White

Codominance FB FB Fw FBFW FBFW FBFW FBFW

Codominance Other example of Codominance. Shorthorn Cattle

Environmental Influences The genetic make-up of an organism only determines the potential of an organism.

Environmental Influences External Influences Temperature Light Nutrition

Environmental Influences Internal Influences Internal body functions Hormones Age