Class 3 - Please remember you must register your iClicker...

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Please remember you must register your iClicker on CU Connect. We cannot give you clicker points until you register your iClicker ! Do not wait!!! See the syllabus on CU Learn for more information Directions here: http://www.colorado.edu/its/cuclickers/students/register.html
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MCDB 2150 – Principles of Genetics Monohybrid and Dihybrid Crosses 08/29/08 Key Words Gene Allele Phenotype Genotype True Breeding Gamete Haploid/Diploid Dominant/Recessive P, F1, F2 Test Cross
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Mono hybrid Cross A mating between individuals that differ in only one trait (eg. seed color) P - Parental F1 – Filial 1 F2 – Filial 2
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P - Parental F1 – Filial 1 F2 – Filial 2 Mendel’s Experiment Parental generation is true breeding.
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P - Parental F1 – Filial 1 F2 – Filial 2 Mendel’s Experiment Parental generation is true breeding. All the green disappeared in F1
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P - Parental F1 – Filial 1 F2 – Filial 2 Mendel’s Experiment Parental generation is true breeding. All the green disappeared in F1 In F2, the ratio of yellow to green was always 3:1 6022 : 2001 [ 3 : 1 ]
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Mendel s Conclusion : "Genetic characters are controlled by unit factors that exist in pairs in individual organisms." P F1 F2 Dominant - trait that appears in all F1 eg. Yellow or Y (capital letter) Recessive - trait hidden in F1, seen in F2 eg. Green or y (small letter)
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Mendel s Conclusion : "Genetic characters are controlled by unit factors that exist in pairs in individual organisms." P F1 F2 Gene – a unit of heredity (the gene for pea color) Allele – alternate forms of a single gene (the dominant allele of the pea color gene, green or yellow)
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YY YY yy yy Homozygous YY, Yy or yy Homozygous and Heterozygous Yy Heterozygous Alleles occur in pairs in diploid cells. Why 3 yellow to 1 green?
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Segregation: two unit factors come apart at gamete (egg/pollen) formation P – diploid parents YY yy Y Y y y Haploid gametes • Alleles are in pairs that separate during gamete formation. • At random, one gamete from each parent come together
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This note was uploaded on 02/25/2010 for the course MCDB 2150 taught by Professor Winey,mark during the Spring '06 term at Colorado.

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Class 3 - Please remember you must register your iClicker...

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