Measure selection on populations after exposure to pesticide

Reference no: EM13300236

In some species of beetles, resistance to particular pesticides is a dominant trait. To measure selection on populations after exposure to pesticide, you first establish a population consisting of a mix of resistant and non-resistant individuals and let beetles interbreed freely until you have a very large population of many thousands of beetles. Your initial population meets all of the assumptions of Hardy-Weinberg equilibrium.

After some time, you start your experiment. Before exposing the population to pesticide, you are able to determine that the frequency of the resistance allele in the sample is 0.08.

a) You take a sample of 500 beetles from your large population of freely interbreeding beetles. How many of these beetles do you expect to be resistant to pesticide?

b) You apply pesticide to your original population. In the next generation (Generation 2), you take another sample. You find that the frequency of the resistant allele is 0.34. Based on the change in allele frequency between generations, what is the selection coefficient on pesticide resistance in this population?

c) You raise your beetles for one more generation (i.e., to Generation 3). Starting with your allele frequencies from Generation 2 and assuming that the selection coefficient on pesticide resistance remains the same as what you calculated in (b), what is mean fitness of the population in Generation 2?

d) What are your expected frequencies of the resistant and non-resistant alleles in Generation 3?

Reference no: EM13300236

Questions Cloud

Determine the charge on each electrode : A parallel-plate capacitor is formed from two 2.20 cm multiplied by 2.20 cm electrodes spaced 2.0 mm apart. What is the charge (in nC) on each electrode

The mfs special purpose fund : The Unified Path is an umbrella organization that solicits donations to support its many charitable suborganizations. One of these is the Millbridge Family Service (MFS). All transactions for MFS are handled through the MFS special purpose f..

Which of the following is a spontaneous source of financing : Which of the following is a spontaneous source of financing?

What payments must zach taylor make to settle : What payments must Zach Taylor make to settle the loan at the interest rate of 11%, but with the 6 payments beginning on the day the loan is signed?

Measure selection on populations after exposure to pesticide : In some species of beetles, resistance to particular pesticides is a dominant trait. To measure selection on populations after exposure to pesticide, you first establish a population consisting of a mix of resistant and non-resistant individuals and ..

Which of the following actions would improve firm liquidity : Which of the following actions would improve a firm's liquidity?

What is the effective annual cost of credit to stoney river : In addition, Stoney River expects to incur a cost of approximately $100,000 in dealer placement fees and other expenses of issuing the paper. What is the effective annual cost of credit to Stoney River (round to the nearest .1 percent)?

How is the new angular velocity related to the old one : A solid disk is rotating about an axis with uniform angular velocity. another disk, with the same moment of intertia about the rotation axis, how is the new angular velocity related to the old one

Which of the following would be considered a fixed cost : Which of the following would be considered a fixed cost in a manufacturing setting?

User Account

All Pages