BILD3problems

BILD3problems - Fall 2005 BILD3 practice Hardy-Weinberg...

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Fall 2005 BILD3 practice Hardy-Weinberg problems Hints : (1) Be sure to know when you are allowed to assume p 2 , 2pq, and q 2 equal genotype frequencies (only when in HW equilibrium), and how to calculate allele frequencies. (2) First step in a HW problem is to figure out what information is provded to you in the questions (e.g., p 2 ) – the rest is just simple math. 1 . A biologist is studying insecticide resistance in a population of the Colorado potato beetle ( Leptinotarsa decemlineata ). At the beginning of the study, only 1 beetle from a population of 10,000 is resistant. A few applications of pesticide (and generations) later, the biologist finds that now that 200 beetles in the population of 20,000 are resistant. Assuming resistance is caused by a double recessive genotype (“rr”), A) If the starting population was initially in HW equilibrium, what is the frequency of allele ‘r’ of generation before pesticide? B)
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This note was uploaded on 04/14/2008 for the course BILD 3 taught by Professor Wills during the Spring '07 term at UCSD.

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BILD3problems - Fall 2005 BILD3 practice Hardy-Weinberg...

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