Lecture 9

Lecture 9 - Bio 121 Lecture 9 Mendelian Genetics A. Gregor...

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Bio 121 Lecture 9 – Mendelian Genetics A. Gregor Mendel a. Austrian monk b. Lived in the 1800s b.i. Prevailing view-genes just mixed and blended c. First first with rigorous quantitative data d. Proposed that genes were passed down through many distinct factors that eventually composed the individual e. Started by trying to get a nonaggressive hardworking bee e.i. Switched to peas in 1865 B. Mendel’s Strategy a. 7 characteristics a.i. Characters (heritable characteristic – flower color, seed size) a.ii. They were either-or, discontinuous traits a.iii. True breeding peas b. Crossed parental plants b.i. Crossed P generation to make F1s b.ii. Removed stamens (guy parts) from plants b.iii. Eventually had seeds formed and counted them b.iv. Allowed F1s to self polonate and produce F2s C. Monohybrid Cross a. Single characters a.i. White vs. purple flowers a.i.1. Performed reciprocal cross (white to purple and purple to white) a.i.1.a. F1s were all alike-all purple a.i.1.b. When F1s crossed (705 purple – 224 white)
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This note was uploaded on 03/12/2012 for the course BIO 121 taught by Professor Minchella during the Fall '10 term at Purdue.

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Lecture 9 - Bio 121 Lecture 9 Mendelian Genetics A. Gregor...

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