Genetics and heredity part iii
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Genetics and Heredity Part III. Every path has its puddle. English proverb. Today’s Agenda. Dihybrid crosses Incomplete dominance Codominance Polygenic. Dihybrid SetUp PpSs X PpSs. Dihybrid SetUp PpSs X PpSs. PS. Dihybrid SetUp PpSs X PpSs. PS. Ps. Dihybrid SetUp PpSs X PpSs. pS.

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Genetics and Heredity Part III

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Genetics and Heredity Part III

Every path has its puddle.

English proverb


Today’s Agenda

  • Dihybrid crosses

  • Incomplete dominance

  • Codominance

  • Polygenic


Dihybrid SetUp PpSs X PpSs


Dihybrid SetUp PpSs X PpSs

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Dihybrid SetUp PpSs X PpSs

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Obj. 9 Incomplete Dominance

  • Definition:

  • A condition in which a trait in an individual is intermediate between the phenotype of the two parents because the dominant allele is unable to express itself fully.


Example of Incomplete Dominance:

  • Red snapdragon X white snapdragon

  • All offspring are pink snapdragons


Codominance

  • Definition: a condition in which both alleles for a gene are fully expressed.

  • Ex. Blood Types


Polygenic

  • Definition: a characterisitc of an organisms that is determined by many genes

  • Ex. Eye color, height, weight


Multiple Alleles

  • Genes with three or more alleles

  • Example: Blood groups

  • A = AO, AA

  • B = BO, BB

  • AB = AB

  • O = OO


Practice Problems


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