BIOL2000 Lecture Notes - Lecture 11: Blending Inheritance, Reciprocal Cross, Mendelian Inheritance
16 Jan 2017
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Pe plants: mendel"s model becayse they have distinct phenotypes that are heritable. Self pollination: femal organ gets pollen from male organ that produces pollen grains. Collect pollen from one indiviual and transfer it. Transfer to female whose male organs were removed. Blending inheritance hypothesis at the time: traits blend to form intermediate phenotpes. Analyzed height, flower color, seed color, pod shape, pod color, flower/pod position. Control experiments: only interpret if you get the expected outcome. Wrinkle produces wrinkle throuhg self or cross. 2 or more versions of a gene: allele. Particulate inheritance: lack of blending and discrete nature. Wrinkledness and roundness: traits from single gene. Round is dominiant and wrinkled is recessive. Assign dominance bc only shows phenotype of 1. 3:1 in f2: plants have 2 copies of genetic info. Diploid or polyploid organism contains multiple copies of 1 allele. Heterozygous: diploid or polyploid: 2 or more alleles. Organism can be homozygous for one gene and hetero for another.
