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Unformatted text preview: Life Science 15: Concepts and Issues Lecture 6: What did Mendel discover? 1/26/12 I. Who was Mendel? II. Physical structure of the genome III. What did Mendel discover? IV. Sex Determination Mendel:- why do offspring look like their parents?- 1859: Origin of Species- how does heritability work?- 1865: mendels talk at the Natural History Society of Brunn- Inheritance in Pea Plants- no questions, no one understood Generic Cell:- chromosomes: linear strand of genetic material- chromosomes come in homologous pairs Visualizing the chromosomes:- karyotype: picture of all chromosomes in a cell- why would you need one? o Test for down syndrome in new baby Two copies for a gene, not necessarily the same. Mendels Law of Segregation:- a gamete receives only 1 allele for each gene (even though an organism generally has 2)- haploid- fertilization reestablishes the diploid number P1 Phenotypes:- Albino: mm Gametes: m and m- Normal: MM Gametes: M and M F1 offspring:- Genotypes: Mm- Phenotypes: normal- Gametes: m and M F1 cross with Punnet Square: Mm x Mm...
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This note was uploaded on 04/10/2012 for the course LS 15 taught by Professor Phelan during the Spring '08 term at UCLA.
- Spring '08