BIOL 110 Chapter Tutorial 16: The Expression of Multiple Alleles and Pedigree Analysis

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19 Mar 2017
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Tutorial 16: the expression of multiple alleles and pedigree analysis. Incomplete dominance: complete dominance: the dominant trait is completely expressed and the recessive trait is not expressed at all in the phenotype a heterozygous individual. Incomplete dominance: the phenotype of a heterozygous individual is an intermediate between the dominant and recessive trait: in incomplete dominance and codominance, traits are expressed as follows, xyxy: x represents character, y superscript represents one trait. F2 generation: 1:2:1 ratio; 1 xyxy, 2 xyxz, 1 xzxz. Xz: codominance: both alleles are expressed fully and separately in a heterozygous individual. All blood types are possible type a can be iaia, iai; type b can be ibib, ibi. What are the possible blood types of the offspring of a type ab and type o. Only type a and type b are possible. One dominant allele and one recessive allele is expressed in every case.

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