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NEST2025BiologyEvolution

Studies have shown that considerable genetic variation exist in the number of abdominal bristles found in fruit fly populations. An experiment on artificial selection on a population of Drosophila melanogaster was carried out for 35 generations. Three respresentative plots I, II and III are shown. If the observed population is undergoing stabilizing selection, then the correct option is:

Options

  1. AAt the end of the experiment, majority of the flies had an average of 40 abdominal bristles.
  2. BPlot II represents the highest proportion of population at the start of the experiment.
  3. CPopulations in plots I and III represent characters selected for during the course of the experiment.
  4. DPlots II and III had the highest proportions of flies at the start of the experiment.

Correct answer

A. At the end of the experiment, majority of the flies had an average of 40 abdominal bristles.

Step-by-step solution

No Solution

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