AGR 3303 Lecture Notes - Lecture 13: Abo Blood Group System, Probability Distribution, Frequency Distribution
17 Mar 2019
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Phenotypic differences results from genetic environmental factors. Phenotypes are determined by counting and measuring. Ex: grain yield, animal weight gain, skin color, blood pressure. Two or more pairs of genes: located in the genome, additive affect on the inherited phenotype. Each gene locus: may contain an additive allele, contributes a set amount to the phenotype, may contain a nonadditive allele, does not contribute quantitatively to the phenotype. Phenotypic affects of each additive allele are small. Additive effects of all alleles are approximately equal. Various allele combinations produce substantial phenotypic variation. 1/16 are red (aabb), 4/16 aabb (intermediate color), 6/16 aabb or aabb (intermediate color), 4/16 aabb or aabb (intermediate color) and 1/16 aabb (white). When calculating the number out of 16, find the ratio of aa out of 4 possible then find ratio of bb out of 4 possible creating x = 1/16 show on the top right.
