(Microsoft PowerPoint - Mendel\222s Genetics) - Jefferson County ...

2/5/2013Mendel _________removed pollenmaking partsand _______ added pollen from _______ another plant.This allowed him to ______ cross-breed plantswith ______ differentcharacteristicsand ________studythe resultsA _____________________ specific characteristic is calleda ____________traitMendel ______________ studied 7 traits in peas.When Mendel _________ crossed PURE plants with 2 _________contrastingtraits: (EX: Tall crossed with short)He always found same pattern:1. ONLY ______ 1 trait __________ showed in the ____ F 1 generationBUT . . .2. ________ Missing trait ________ returned in the ____ F 2 generationin a ____ 3:1 ratioP 1____ generation(_________)parental____ F 1 generationfilial(______= offspring)___ F 2 generationWho was Gregor Mendel?Mendel decided that theremust be a _________________pair of FACTORSthat ________each control trait andthat _________one factormust be ableto _______ HIDE the other.We now know that Mendel’s________________ factors are genes carried onthe pair of________________Homologous chromosomesMendel’s 4 genetic Hypotheses 1. An individual has two copies of the gene – onefrom each parent.Mendel’s 4 genetic Hypothesizes 2. There are multiple versions of a Gene.--meaning that for a Gene that expresses a flowercolor, there may be Pink Color Genes, WhiteColor Genes, and Red Color Genes.--These different versions of the samecharacteristic are called Alleles.2