BSCI 1511 Lecture Notes - Lecture 20: Cleft Lip And Cleft Palate, Gynoecium, Genetic Drift
15 Jan 2018
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Document Summary
3:1 ratio occurs every time homozygous: conclusions, dominant allele determines phenotype if two alleles differ, law of segregation: two alleles for heritable character separate during gamete formation and end up in different gametes. Homologous chromosomes: testcross = breeding dominant phenotype with recessive phenotype to determine genotype, monohybrid = one character, dihybrid cross would be following two different traits at the same time. Law of independent assortment: smooth come from same factor: crosses two true-breeding yellow smooth peas and green wrinkled peas, f1 is all yellow and smooth, dependent assortment would be 3:1 phenotypic ratio in final yellow and. Independent assortment occurred 9:3:3:1 phenotypic ratio color and: each trait"s characteristic was 3:1 phenotypically smoothness coded by different factors. Ppyyrr = (pp) x (yy) x (rr) = 1/16. Inheritance patterns can deviate from simple patterns: phenotypes not completely dominant or recessive, gene has more than two alleles, gene produces multiple phenotypes.
