Lecture 6 Mendel cont Student

Lecture 6 Mendel cont Student - Announcements 1 Mendels...

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Announcements 1
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2 Mendel’s  Breakthrough
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Themes of Mendel’s work Variation is widespread in nature. Observable variation is essential for  following genes. Variation is inherited according to  genetic laws and not solely by chance. Mendel’s laws apply to  __________________ ___________________________________ ____
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State of genetics in  early 1800’s What is inherited? How is it inherited? What is the role of  chance in heredity? Homunculi in sperm as drawn
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Keys to Mendel’s  experiments The ________________________was an ideal  organism. Vigorous growth Self fertilization Easy to cross fertilize Produced large number of offspring each generation Mendel analyzed traits with  ______________________ ____________________________________________ ____. Purple vs. white flowers Yellow vs. green peas Round vs. wrinkled seeds
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_____________ crosses reveal units  of inheritance and Law of  _______________. Fig.2.9
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Alternative forms of traits are  __________ Each trait carries two copies of a unit of inheritance Allele for Green Peas Allele for Green Peas Allele for Yellow Peas Pair of  ________________ ________________ __________ for  Pea Color Gene
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Fig. 2.10 Law of  Segregation
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Fig. 2.11 The Punnett  Square
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Rules of Probability ______________________________: probability of two events occurring together What is the probability that both A and B will occur? ______________________________: probability of one or another event occurring. What is the probability of A or B occurring?
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Probability and Mendel’s  Results Cross Yy x Yy pea plants.   Chance of Y sperm uniting with a Y egg ½ chance of sperm with Y allele ½ chance of egg with Y allele Chance of Y and Y uniting = ______________________ Chance of Yy offspring ½ chance of sperm with y allele and egg with Y allele ½ chance of sperm with Y allele and egg with y allele
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predicted ratios. Fig. 2.12
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This note was uploaded on 04/05/2009 for the course BIOL 202 taught by Professor Kieber-hogan during the Spring '08 term at UNC.

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Lecture 6 Mendel cont Student - Announcements 1 Mendels...

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