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Codominance and Incomplete Dominance

Codominance and Incomplete Dominance. Dominance. What is dominance?. What makes a gene dominant? What makes a gene recessive? These factors affect most genes and cause them to be expressed or hidden. Dominance. Some genes do not play by the same rules

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Codominance and Incomplete Dominance

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  1. Codominance and Incomplete Dominance

  2. Dominance • What is dominance? • What makes a gene dominant? • What makes a gene recessive? • These factors affect most genes and cause them to be expressed or hidden

  3. Dominance • Some genes do not play by the same rules • These genes have special ways of being expressed • These genes are not dominant or recessive

  4. Codominance • There are several genes that have two different dominant traits • If these two dominant traits are expressed at the same time we call it codominance • Codominantgenes are genes that express both alleles in the pairing

  5. Codominance • We call them codominant genes because both alleles in the gene are expressed • Both dominant traits are represented in organisms

  6. Codominance • Cows are a great example of codominance • There are cows that are a red color • There are cows that are a white color • Both of those cows have a dominant phenotype • However when we have one dominant gene that is white and one that is red we have both expressed

  7. Codominance

  8. Incomplete Dominance • Sometimes genes do not have such an easy idea for dominance • Sometimes with genes there is no defined dominant gene • When there are two different genes that are considered dominant, they can blend

  9. Incomplete Dominance • Genes that blend with two dominant alleles are called incomplete dominance genes • These genes can be found in many different types of organisms

  10. Incomplete Dominance • Snapdragons are a good example of incomplete dominance • There are red Snapdragons • There are white Snapdragons • There are also pink Snapdragons that are formed with a heterozygous genotype

  11. Incomplete Dominance

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