Lecture 13 - Lecture 13: Feb. 4 Mendelian Genetics...

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1 Lecture 13: Feb. 4 Mendelian Genetics • Early Ideas about Inheritance • Mendel’s Research - Mendel’s system - discrete traits - Punnett Squares • Mendel’s Contributions - particulate theory - law of segregation - dihybrid crosses - law of independent assortment Discussion Activity This Week Genetics Problem Set (week 6 folder) Exam 1 will be handed back in section Check Qwizdom Points on SAMS https://cats.lsa.umich.edu/ Chapters 13 :269-280 Experiment that gets at why sexual reproduction exists Why does sexual reproduction exist?
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2 Preformation Hypothesis : an individual already exists in microscopic form in either the egg or sperm and only needs to unfold during development. Spermist Homunculus Hypothesis Blending Inheritance Hypothesis Sperm and eggs of parent organisms contain a sampling of the parent's "essence" that is blended together in the offspring to give an intermediate resultant condition. Yellow + Red = Orange Gregor Mendel 1822-1884 mechanisms of inheritance ? Early Ideas about Inheritance
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Lecture 13 - Lecture 13: Feb. 4 Mendelian Genetics...

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