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INCOMPLETE DOMINANCE Incomplete Dominance- Pattern of gene expression in which the phenotype of a heterozygous individual is intermediate between those.

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Presentation on theme: "INCOMPLETE DOMINANCE Incomplete Dominance- Pattern of gene expression in which the phenotype of a heterozygous individual is intermediate between those."— Presentation transcript:

1 INCOMPLETE DOMINANCE Incomplete Dominance- Pattern of gene expression in which the phenotype of a heterozygous individual is intermediate between those of the parents. Cases in which one allele is not completely dominant over another. Example: Snapdragons and Carnations

2 Incomplete Dominance- F 1 generation

3 Incomplete Dominance- F 2 generation

4

5 CODOMINANCE Codominance- The condition in which both alleles in a heterozygous organism are expressed. BOTH alleles contribute to the phenotype. The two alleles don’t blend, but are rather both present in the offspring. Examples- Checkered Chickens, Roan Horses, Roan Cows, Variegated Clover.

6 BB W W BW Codominance White chicken Black chicken Checkered BlackWhite

7 http://search.vadlo.com/b/q?rel=2&keys=Dominance+Incomplete+Dominance+Codominance+PPT Roan Horse

8 Roan Cattle Variegated Clover http://3.bp.blogspot.com/_zUPrgMM5tUg/SSVdrs59_uI/AAAAAAAAAA8/qJGjG2nZPhk/s200/codominance.GIF http://www.ccs.k12.in.us/chsteachers/BYost/Biology%20Notes/CH11notescoincompletedom_files/image004.jpg

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