Introduction to Genetic Analysis 148

Introduction to Genetic Analysis 148 - 44200_04_p115-150...

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NUMBER OF ASCI OF TYPE a ± ba ± b ² a ± ± ± ± b ² a ± b ² a ± ± b ² a ± b ² a ² ± ² ± b ² a ² ± ² ± b a ² ± b ² a ² ± ² ± b ² a ² ± b ² a ² ± b ² a ² ± ² ± b ² Cross a ² ± b ² a ² ± ² ± ± b ² a ± ± b ² a ± b 13 4 3 4 3 2 0 0 0 0 28 4 1 1 5 0 0 0 0 35 5 3 4 0 0 2 0 0 47 1 1 1 8 1 8 0 1 5 9 6 24 22 8 10 20 63 1 0 1 3 6 1 0 4 79 5 0 3 2 0 0 0 86 72 0 2 2 1 21 12 2 9 69 0 10 18 0 1 2 10 16 14 2 60 1 2 5 11 51 49 0 0 0 0 0 Non- Parental Tetra- parental ditypes types ditypes Cross Parents (%) (%) (%) 1 a ± b ² ³ a ² ± b 51 45 4 2 c ± d ² ³ c ² ± d 64 34 2 3 e ± f ² ³ e ² ± f 45 50 5 For each cross, map the loci in relation to each other and to centromeres. 30. Three different crosses in Neurospora are analyzed on the basis of unordered tetrads. Each cross com- bines a different pair of linked genes. The results are shown in the following table: For each cross, calculate: a. The frequency of recombinants (RF). b. The uncorrected map distance, based on RF.
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This note was uploaded on 01/10/2011 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.

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